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Toyota RAV4 Prime vs. Tesla Model Y Maintenance Cost Analysis - A Surprising Outcome

We contrast the difference in price to maintain a 2021 Toyota RAV4 Prime PHEV and a Tesla Model Y BEV all-wheel drive green crossover. The result surprised us.

For savvy buyers, purchasing a new vehicle means carefully calculating the total cost of ownership. Electric vehicles typically cost more up-front but hold the promise of a lower cost for maintenance. In the past, we have analyzed the maintenance costs of EVs and been a bit disappointed by the promised savings. One new vehicle that begs for a contrast to a battery-electric vehicle like the Tesla Model Y is the Toyota RAV4 Prime. This new plug-in hybrid-electric vehicle (PHEV) uses modern internal combustion engine (ICE) technology to reduce ownership costs. We felt it would be worth contrasting the new 2021 RAV4 Prime with a battery-electric vehicle its same size, the Tesla Model Y, to see the cost savings the battery electric vehicle would offer.

Tesla Model Y image courtesy of Tesla Media support

Many EV advocates point to legacy ICE vehicle costs of maintenance when they argue that electric vehicles have an overall lower cost of ownership. In theory, we agree that battery electric vehicles (BEVs) should be lower in cost. However, we have carefully tracked the costs to maintain multiple conventional gas-powered vehicles over their lifespans. We know that the single highest cost to maintain a vehicle is not oil, not transmission fluid, not a timing belt change, but rather, tire replacement.

Toyota RAV4 Prime image courtesy of Toyota media support

BEVs have many of the same costs of maintenance as do modern green PHEVs. To make this story a bit easier to follow, we won’t tally up those costs that are the same or nearly identical. For example, tire rotation. Why bother? Instead, we will contrast a specific battery electric vehicle with a specific plug-in hybrid, both with all-wheel drive, and both the same size. Our aim is to see how much more the PHEV will cost an owner to maintain. We will do so for two sets of mileage totals. 50,000 and 100,000 miles.

Related Story: Toyota RAV4 Prime Will Costs Buyers About Half What A Tesla Model Y Will Cost

Before we begin, note that Toyota includes all required maintenance for two years and 25K miles in the purchase price of its vehicles. That helps to keep costs down initially, but there are very few maintenance requirements for any vehicle before 25K miles. Included maintenance is not unusual. Hyundai also offers included maintenance, in its case, for three years. Premium brands like Jaguar, Genesis, and BMW offer as many as five years of maintenance in the purchase price. This is why we ran the numbers out to 100K miles.

KBB Oil change cost imageToyota RAV4 PHEV Oil Change Costs
Toyota’s RAV4 Prime has a 10,000-mile change interval. However, it has a 5,000-mile change interval for certain conditions. We will calculate the costs both ways. To find the price of an oil change for the RAV4 Prime, we phoned the nearest Toyota dealer to us (Toyota of Woburn, MA). The service department was very helpful. In addition, we used KBB’s service cost estimator and plugged in the RAV4 Hybrid, which is the closest vehicle to the new RAV4 Prime and shares the same oil change costs.

Related Story: Toyota's RAV4 Prime and Hybrid Show Just how Silly Tesla Model Y's Promised Fuel Savings Are

The undiscounted cost of an oil change we will use is $80. That is what we were quoted by Woburn Toyota, and it falls neatly within the KBB estimate. Using the 10K change interval, the oil cost for the RAV4 Prime at 50K miles is $240 (3 changes). The total cost by 100K miles would be $640 (8 changes). If we use the shorter 5K service interval, the cost is $400 (5 changes) by 50K miles, and $1,200 by 100K miles (15 changes). Remember, these costs take into account Toyota’s 25K miles of included maintenance. It does not take into account service discounts for oil changes, which are very common. Mazda has been offering health care workers free oil changes for months (for any brand). $49 synthetic oil change deals are commonplace. Dealers know that cheap oil changes bring shoppers to showrooms to browse.

KBB Transmission fluid flush imageRAV4 Prime Transmission Fluid Changes
Toyota’s RAV4 Prime has an unusual transmission with no “gears.” We could find no mention of changing the fluid in the manual, nor could the service and parts department people at Woburn Toyota. However, we will note that KBB offers an estimated cost for the similar RAV4 Hybrid. We will apply a total cost of $400 for transmission service over 100K miles, although we are pretty sure that it is unnecessary. The Mazda CX-5 and Subaru Forester crossovers do not have routine transmission fluid changes. The Honda CR-V requires its transmission fluid be changed only once every 90K miles. We feel we are being overly conservative by assigning a cost for the RAV4 Transmission fluid change.

RAV4 Prime Spark Plugs, Timing Chain, Power Steering Fluid, Tune-Ups

According to Woburn Toyota, the RAV4 Prime’s engine does not have a replaceable belt, but rather a timing chain that is not a maintenance item. Like all modern crossovers, there is no power steering pump that uses hydraulic fluid in the RAV4 Prime. Like all modern ICE engines, the RAV4 Prime cannot be “tuned up.” That term originated when adjustable distributor caps were still being used. There is no way to “tune up” a RAV4 Prime engine. The coolant of the RAV4 Prime’s engine is rated for over 100K miles. All of these costs are zero. When the RAV4’s spark plugs do need changing at 120K miles, they cost about $14 each. We had the iridium plugs in a V6 Highlander changed this month for just $80.

RAV4 Prime Filters – Cabin, Battery, Engine
The RAV4 Prime has an engine air filter. The cost from Toyota’s parts department is $35. You can buy one on Amazon for $14. It can be replaced at home with no tools, just like the air filter element in many ICE vehicles. It has a change interval of 30K miles. We will assign a $50 cost for this item, figuring some owners may add it to other work done by the dealer. So, by 50K miles, it would cost an owner $50, and by 100K miles about $150.

Since all modern vehicles have a cabin air filter, we will not assign a cost to the RAV4 Prime for this item. They can be purchased on Amazon for around $10 and changed in under 3 minutes without tools (it’s behind the glove box). The Model Y has two cabin air filters, but we will call this one a zero cost for both vehicles in our analysis.

The RAV4 Prime has a nylon filter used in the traction battery cooling system. It is not a replacement item, but in the event it is damaged, its cost is about $20. We will not assign any cost to this item. The Model Y also has a battery cooling system.

RAV4 Prime Tires vs. Model Y Tires
Although Tesla owners often report short mileage life for tires compared to most vehicles, we will assume that the time for changing them is the same for the Model Y and RAV4 Prime. Based on what Tesla owners report at the Tesla owners’ forum, we will use a 30,000-mile tire change interval. Three sets of replacement tires over 100K miles is not unusual based on our detailed records of multiple vehicles, which include a Toyota crossover.

We priced tires using Tire Rack. Since the RAV4 Prime trim was just released this very month and is not yet listed, we used the RAV4 Hybrid as an example, but we verified that the tires size was the same as the Prime. We priced the least expensive OEM tire size for both the RAV4 Prime and Model Y. We also tried to match the original tire model (OEM) since Tire Rack lets you sort that way. We found a cost for the RAV4 Prime of $153-$165 for size 225/60R18. Therefore, we will assign a cost of $160 x4 tires at 50K miles and $160 x12 at 100K miles. The totals are $640 and $1,920, respectively.

The least expensive OEM Tesla tires we found in size 255/45R19 were $283. So the Tesla 50K cost is $1,132, and at 100K miles the total is $3,396. Being a higher-performance vehicle with larger tires, this is no surprise to us. Here, the RAV4 Prime has a lower cost for required maintenance.

Brakes – RAV4 Prime vs. Tesla Model Y
Like every green vehicle, both the Toyota RAV4 Prime and Tesla Model Y have regenerative engine braking systems. Although we suspect that brake services at Tesla may be more expensive than at Toyota, we will call this even.

Related Story: Hidden Benefit - Toyota Hybrids Like Prius Go 100K Before Needing Brakes

Summary of Costs Toyota RAV4 Prime vs. Tesla Model Y
To summarize, the RAV4 Prime has added costs that the Tesla Model Y does not.
We estimate that the added costs at 50K miles total up this way:
Oil = $240 or $400 depending upon change frequency
Transmission Fluid - $0 or $200 depending upon if the owner changes the fluid
Engine air filter - $50
Tires -A credit of $492
Total Cost Difference– A credit to the RAV4 Prime of $202 to a credit to the Tesla Model Y of $108.
So, by our estimation and calculation, and with all the possible maintenance we can think to throw at the RAV4 Prime PHEV, by 50K miles, there is simply no meaningful difference in maintenance costs to the owner between these two vehicles. They appear to be equal.

We estimate that the added costs at 100K miles total up this way:

  • Oil = $400 or $1,200 depending upon change frequency
  • Transmission Fluid - $0 or $400 depending upon if the owner changes the fluid
  • Engine air filter - $150
  • Tires -A credit of $1,476 to the RAV4 Prime
  • Total – A credit to the RAV4 Prime of $926 to a credit to the Tesla Model Y of $274.

Conclusion RAV4 Prime vs. Tesla Model Y Maintenance Costs
Our contrast between these two green AWD crossovers of equal size, one with a plug-in hybrid electric vehicle (PHEV) drivetrain and one with a battery-electric vehicle (BEV) drivetrain, is that the maintenance costs at both 50K miles and 100K miles seem to favor the PHEV. We conclude that the difference is as much as $926 in favor of the PHEV, ranging to a possible difference of $274 favoring the BEV. Most of the reason for this is tires. Had they worn the same tires, the outcome could be different. But not significantly different. We find a total cost of maintenance for 100K miles related to the RAV4 Prime’s engine ranging from about $550 to about $1,750. Given that these vehicles have an up-front cost to the consumer ranging from about $31K to about $73K, drivetrain maintenance is a small fraction of the cost of ownership.

JD Power 2020 IQS

Since both of these vehicles are very new to market, it is hard to say what their repair costs might be. Toyota has a long legacy of durability, reliability, and quality, and still scores above average or near the top of every survey of owners related to reliability. Its hybrid vehicles tend to be the top-performers on quality surveys. Tesla’s legacy is mixed. It scored dead last on a recent survey of owners by J.D. Power related to initial quality, but the brand has seen gains in overall quality.

If you see any mistakes in this story, please point them out. If they are mathematical, or error by omission, we will edit the story and make a note about the edits in the story as well. We were surprised that the Toyota PHEV was the less expensive to maintain vehicle compared to a Tesla BEV. What is your opinion of this maintenance cost analysis of two AWD green crossovers of equal size?

John Goreham is a long-time New England Motor Press Association member and recovering engineer. John's focus areas are technology, safety, and green vehicles. In the 1990s, he was part of a team that built a solar-electric vehicle from scratch. His was the role of battery thermal control designer. For 20 years he applied his engineering and sales talents in the high tech world and published numerous articles in technical journals such as Chemical Processing Magazine. In 2008 he retired from that career to chase his dream of being an auto writer. In addition to Torque News, John's work has appeared in print in dozens of American newspapers and he provides reviews to many vehicle shopping sites. You can follow John on Twitter, and view his credentials at Linkedin

Source Notes:
Toyota RAV4 Prime Maintenance Manual
KBB Cost Estimation Tool
J.D. Power 2020 IQS Overview Link
Tire Rack
Tesla Maintenance Schedule (See page 158)
Tesla Model Y image courtesy of Tesla Media support
Toyota RAV4 Prime image courtesy of Toyota media support
Top of page image by John Goreham. Re-use with permission only.


Peter J Harrison (not verified)    August 17, 2020 - 9:45PM

Toyota hybrids do not have transmission gears or transmission fluid. They use the "synergy drive," a concept developed by Stanford University engineering students, that essentially couples two direct-drive electric motors and has them do the job of handling rotational ratios and torque.

So, no cost for transmission fluid changes. Ever.

Rob Sedrick (not verified)    August 18, 2020 - 6:39AM

In reply to by Peter J Harrison (not verified)

I own a 2005 Prius that I've had for ten years. I do all of my own maintenance. All of the Toyota hybrids use a planetary gear set to combine and also separate the power from the two electric motors in the transaxle and the internal combustion engine. The gear set is at the heart of what creates the "synergy" between the engine and the two electric motors. All Toyota hybrid transaxles do require the use of the Toyota WS (world standard) transaxle fluid to lubricate the planetary gear set and the final drive gears. The capacity for my second generation Prius is four quarts. And I change the fluid every 60K miles.

Raf (not verified)    August 18, 2020 - 12:32PM

In reply to by Peter J Harrison (not verified)

Hmmm, what’s that red fluid I’ve been replacing on Prius/Camry vehicles??? Yes, there are two motors MG1 and MG2 . Power from MG2 is transferred to the wheels through a compound gear set and differential that are lubed/cooled by ATF that usually is dirty by 100k mark.

John Goreham    August 18, 2020 - 2:17PM

In reply to by Raf (not verified)

Thanks, Raf and Rob S. I'm with you. There is definitely some uncertainty on this point, so I threw in the $400 cost over 100K just to be sure we were not missing a cost. The service person I spoke to said, "Well there is a drain plug, but I can't see any required changes." That makes me think dealers may suggest this service.

Merlin Valencia (not verified)    August 18, 2020 - 7:30PM

In reply to by Peter J Harrison (not verified)

They do have transmission fluid it's called ATF type-WS. At least it is on the Prius. The maintenance looks very simular to Prius. I think the first change is 100k then 30k after that. Its very easy to change also just drain and fill.

Timothy Parker (not verified)    August 17, 2020 - 11:30PM

You might have also included the cost of car insurance, which I have heard is quite high for a Tesla. The other issue is that, according to personal accounts I have read or watched, repairs on any Tesla are very expensive. A full analysis of expected cost of ownership would likely be even more favorable for the RAV-4.

John Goreham    August 18, 2020 - 2:01PM

In reply to by Timothy Parker (not verified)

You make a good suggestion. However, I've done exhaustive work writing about car insurance for another publication and it is nearly impossible to draw any real contrasts because the individual driver, location, and other circumstances can move the costs so dramatically. More expensive vehicles usually are more expensive to insure (and pay taxes on). So in that regard, the RAV4 Prime is likely to cost less.

Byron Blue (not verified)    March 10, 2021 - 10:13PM

In reply to by Timothy Parker (not verified)

I own a Tesla Model 3, 2019, and a Toyota Pruis Prime Plug-In Hybrid, 2017. I drive both and my insurance for the Tesla is $200 cheaper than for the Prius per year, both have the same coverage. The older Prius has 105K miles on it and the newer, costlier, Tesla has 26K miles. We alternate between the two, but usually use the Tesla for long drives, 'tho before we got the Tesla the Prius was our only car. The Tesla is also lower in maintenance and fuel costs than the Prius. The cost of charging didn't make much of bump in my electric bill and later I put in solar power. Now I run my house free and drive for free too due to the solar. I still have to buy gas and oil changes for the Prius. The tires last many miles on the Prius, possibly about 70 < 75K miles, and the Tesla will probably ned new tires at about 40 < 45K miles and they cost more. So, not enough time to sort out all the costs and savings for maintenance, but, by doing my own little tune-ups, I'm guessing they will be very close in total ownership costs.

tagware (not verified)    August 18, 2020 - 5:15AM

What happen to the most expensive item? Fuel
Second, How long is the ICE car going to live before it's maintenance cripples it? 5-7 years?
Clutching at straws comes to mind. :o)

John Goreham    August 18, 2020 - 2:06PM

In reply to by tagware (not verified)

You can find a detailed breakdown of the energy (fuel) costs per year for both vehicles at the "Related Story" tab in the middle of the story. It's between the two KBB images. I'm not sure how maintenance would cripple a Toyota plug-in hybrid electric vehicle. Feel free to elaborate. Toyota Prius hybrids with well over 300,000 miles are commonplace and you can communicate with the owners on Facebook at the Prius owners club.

Byron Blue (not verified)    March 10, 2021 - 10:28PM

In reply to by tagware (not verified)

Well, my Prius is notable for its long life, often they exceed 300K miles with proper maintenance, which is minimal. My other car is a Tesla Model 3 and "fuel" costs are aprx. 1/4 the cost of an ICE per mile, tires costlier with maintenance also very minimal. Insurance is cheaper on the Tesla by about $200/yr., same coverages on both. The Tesla is expected to last about 400 < 500K before needing new batteries. Agreed, few ICE cars are as low cost and last so good as a Prius.

RonJon (not verified)    December 18, 2022 - 1:18AM

In reply to by tagware (not verified)

One must not forget about the cost of electricity. Gasoline is very similar to the price of electricity where I live. Unless you are fully off the grid our electricity is produced with imported diesel.
Oh, and the cost of battery replacement.
Bodywork on a Tesla? I don't want to go there.

Julius Rahmandar (not verified)    August 18, 2020 - 8:14AM

Wow this almost garbage article. The biggest thing that makes it PHEV or BEV is what? The BATTERIES. That should have been the first Cost item considered. IF you don’t know, Li-Ion batteries (or NiMh) have limited charge discharge cycles. When that time is reached, I’d like to know what is replacement cost (including labor.
Any portable devices that have Li-Ion batteries usually last between 500-1000 cycles. At 100K miles, these vehicles will probably need new battery packs.

John Goreham    August 18, 2020 - 2:12PM

In reply to by Julius Rahmandar (not verified)

Toyota warrants the battery pack in the RAV4 Prime for 10 years or 150,000 miles. Toyota warrants the hybrid-electric components for 8 years or 80K miles. These are on top of the standard drivetrain warranty that lasts 5 years or 60K miles.

Byron Blue (not verified)    March 10, 2021 - 10:38PM

In reply to by Julius Rahmandar (not verified)

My friend had his Prius battery pack replaced at a Toyota dealer for $2K, inc. parts and labor. It's an old car, DK the mileage. Another friend gave his Prius to his niece at 170K with original batteries. She has driven it for several years now, no trouble.

Byron Blue (not verified)    March 10, 2021 - 10:42PM

In reply to by Julius Rahmandar (not verified)

Goops! I forgot to mention that my own 2017 Prius Prime Plug-In Hybrid has 105K miles and no problem with the batteries. In fact, no issues at all.

Toby (not verified)    August 18, 2020 - 9:13AM

The article missed the cost of time for all those maintenance visits which are offset by the time it takes to refuel.

John Goreham    August 18, 2020 - 2:15PM

In reply to by Toby (not verified)

I'm not sure I follow your post. Feel free to clarify. Tesla requires brake service in salty areas every 12,500 miles and recommends tire rotation every 6,250 miles, so two or three times per year. Toyota has a 5K and 10K service interval depending on conditions. Both vehicles can be charged at home, at public chargers, and the RAV4 Prime can also be fueled at any corner gas station.

Tre Born (not verified)    August 21, 2020 - 2:58AM

In reply to by John Goreham

Tesla requires brake service in salty areas?!?@!?!? Really? I have never seen a comparison done about salty areas even though you don't mention Toyota in Salty areas so I guess it is just a salty onside sided put down on Tesla. You should do an article and compare Tesla on hot Volcanic Lava versus Toyota on regular street roads. Another good compare...

John Goreham    August 21, 2020 - 9:14AM

In reply to by Tre Born (not verified)

Yes, Tre. Most manufacturers have a more frequent service requirement for wintery conditions. You can read Tesla's in its service manual on page 158. The Tesla manual is linked at the bottom of the story. Tesla requires a brake clean and lubrication service in areas that use road salt every 12,500 miles, so more frequently than once per year. At the top of our story, we also mention that Toyota's oil change requirements vary depending upon the conditions in which the car is driven. These two vehicles both come with all-wheel drive standard, which is more commonly used by drivers in wintery areas. We also linked directly to the Toyota manual. How would you suggest making the comparison more fair and transparent?

Tre Born (not verified)    August 21, 2020 - 12:17PM

In reply to by John Goreham

Fair question. How to make it more fair is to compare apples to apples. You are referring to how often Tesla brakes have to be changed on salty roads. You make no mention about salty roads with Toyota. I think you are better off comparing how often each manufactures recommends changing their brakes without salty conditions as you do not have a recommendation from Toyota at all about salty roads.. As you probably know, local dealerships often recommend more frequent changes in everything. Yet, you don't mention that. I think you would agree they do - As that is a bulk of their income. My local Honda and Kia dealerships recommended more frequent changes than the manufacturer's Kia and Honda. Bottom line is fair is only doing comparisons on apples to apples. Not salt to nothing. How many people drive in salty areas anyway? How about dirty and dusty areas comparisons. That impacts ICE much more than Electric. (Air intake, Oil, Fuel Filter). And that would be apples to apples if you have recommendations from ICE and Tesla.

John Goreham    August 21, 2020 - 1:13PM

In reply to by Tre Born (not verified)

I think I follow your points, but we included ALL of the maintenance items in the main story. And we did not assign any fees to the Tesla for any brake services. None. How many drivers use all-wheel drives in salted roadway areas? Nearly all of those who live above the Mason Dixon Line, so hundreds of millions just in North America. ps - this story is not a comparison. It is a contrast. Meant to show differences, not similarities.

Tre Born (not verified)    August 21, 2020 - 3:04PM

In reply to by John Goreham

Interesting you reply to comments only that make your case. For instance, you mention salt being normal in Northern states as being why it is import to mention salt. But you skip the part when I mention dusty roads. Which exists in all 50 states - not just northern states. You agree with me the dust effects ICE vehicles more than BEV due to oil, intake filtering, etc. But you don't acknowledge it.

You agree with me that Local dealerships want you to replace much more frequently than manufactures. Yet you also avoid the comment.

I believe you are trying to be fair - But I think your biases are affecting you more than you know. I give you the last word.

John Goreham    August 21, 2020 - 6:56PM

In reply to by Tre Born (not verified)

Thank you Tre Born. In the section on oil, I point out that Toyota has some conditions that require a shorter 5K oil interval. Dusty conditions is included. I calculated the costs in the story based on that shorter interval and also the "normal" 10K interval. With regard to air intake filters, I do assign a cost to the RAV4 for the engine air intake. It is there in the section on filters. The RAV4's engine air filter costs $14 on Amazon, or it costs $35 at the dealer (we phoned to get the price). It can be easily replaced with no tools, but as I mention in the story, some folks may ask the dealer to do that install, so I assigned a $50 cost to the engine air intake filter (x3 over 100K). Since both the Model Y and RAV4 Prime have cabin air filters, I did not assign any cost to either. The point of the story was to contrast the costs where they differed, so there is no need. Tesla actually has 2 cabin air filters, but I still did not assign a cost. In the RAV4, the cabin air filter is in the glove box and can be changed with no tools in under a minute. It costs $10 on Amazon. So, I think the main story went into pretty fine detail on the air filter topic. I appreciate your taking the time to chat. I have a new story about crossover maintenance coming next week and it is specifically about air filters. I'm on a mission to get owners to change their own instead of overpaying at dealers. Cheers,

Byron Blue (not verified)    March 10, 2021 - 11:16PM

In reply to by John Goreham

I own a Toyota Prius Prime Plig-In Hybrid, 2017, with 105K miles. My other car is a Tesla Model 3, 2019, with 26K miles. I rotated the Tesla Tires at 10K intervals have never had brake service since I live in the Palm Springs, CA area which is a desert and with very hot summers, i.e., no salted roads ever! The only Tesla maintenance required is a minor service (filter change) in the battery heating/cooling system every 4 yrs. Optional, much as with any car, is wipers changes and checking/changing the brake fluid at two yr intervals, but since both are good at two yrs I don't plan to do the optional service. I will do the filter change in two more yrs. along with a cabin air filter. With solar power I drive for free and run my house for free too. I do fill my Prius at the neighborhood gas station, but charge it for free at home too. On long trips, I charge at public "Tesla Supercharger" stations costing me 1/4 the price/mile as gasoline for most ICE cars and about 1/2 the cost of fueling the Prius. I do Prius oil/filter changes at 10K intervals and do my own "tune-ups" on. the Prius. BTW, insurance cost on both cars with equal coverage is $200 les/yr on the more valuable Tesla.

Daniel Suthers (not verified)    August 19, 2020 - 12:52PM

RE: brakes on a PHEV. I owned the 2002 (Gen 1) Prius and in 170K miles never had any brake work. I could not even get my mechanic to replace the pads as a preventive measure at 150K miles. Now I own a Prius Prime PHEV and it has the same braking system as the RAV4 PHEV and at 20K miles shows no wear at all.

Daniel Suthers (not verified)    August 19, 2020 - 1:07PM

RE: service intervals. It's hard to determine the proper maintenance intervals for a PHEV's ICE components. Since the RAV4 will default to BEV mode, the ICE will not kick in until you drive 45 minutes or more. This year I've had to force my Prius Prime into ICE mode for 5 minutes a month just to keep the seals from drying out. In a year, that's one hour of run time, or about the same as a 60 mile drive on the freeway.

I drive from 3 to 25 miles a day and it defaults to running on battery. It's always in EV mode. When we are not under quarantine I make monthly 1000 mile trips, giving the car 15 hours of hybrid mode driving. In hybrid mode the ICE only runs about 50% of the time, so the ICE sees the equivalent of about 6000 miles a year. With synthetic oil I only need to service the ICE components every 18 months or so.