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3 Ways To Reduce Oil Consumption On Your Toyota Prius

If your Toyota Prius is consuming oil, here are 3 ways you can slow it down or even get it to stop.

It is no secret that higher mileage Toyota Prius cars consume engine oil, and some do it at an alarming rate. I know because I was one of those people. The issue drove me crazy until I learned what was causing it and what to do about it.

I now know that sticking piston rings, engine wear, and clogged ports are all causes of engine oil consumption. One of the best ways to prevent your engine from consuming is to be religious with oil changes and other engine maintenance.

Not every Prius owner is a Toyota technician like me, though, so that does not always happen. But if your Prius is consuming oil, the good news is you can most likely slow it down or get it to stop. Here are 3 things that every Prius owner needs to have done.

Your PCV Valve
The positive crankcase ventilation valve is something many never pay attention to but should. The valve is responsible for allowing blowby gasses to get used back through the intake manifold. The valve over time can get plugged up with carbon and other junk that is carried in the mist.

Toyota Prius PCV valve replacement

When this happens, the pressure in the crankcase builds up, and instead of the oil getting scraped off and collected into the oil pan, it clings to the cylinder walls. When combustion happens, the remaining oil gets cooked off. Over time, this will lead to increased oil consumption.

Long story short, if you are over 100k, get that PCV valve replaced as part of your routine high mileage maintenance.

Your Rings Are Choked Up
Over time engine oil breaks down with hybrids starting and stopping all the time the engine oil is put to extreme use. When oil is sheared, heated, and cooled more often, it breaks down faster. When it breaks down, it forms hardened carbon deposits that live in your piston rings.

When piston rings get plugged up with carbon, they cannot scrape the engine oil off the cylinder walls. This, in turn, causes more oil to be left in the combustion chamber and burned off during regular use.

There are a few remedies for this. I have found that the Hybrid Repair Kit from BG Products is the most effective at solving this issue. The kit, which contains 3 parts, targets oil consumption in multiple ways to help your engine loosen up those rings and get them sealing again.

BG Products Hybrid Repair KitTop Engine Cleaning
Sometimes our engines are so dirty they need extra help. The good thing is, companies are willing to make products for us to do just that. CRC is a company that makes incredible products to help with carbon build-up, and here is how.

I wrote an article a while ago explaining how you can clear your P0420 light from your Prius for less than $20. The more research I did about this product, the more I realized it can help oil consumption.

The CRC Turbo and Intake Valve cleaner is highly effective. The chemical is sprayed directly into a running engine and softens the carbon. After some time, as stated on the can, take your Prius on the highway to blow the carbon out.


Not only did this chemical shut off my P0420 catalyst code, but my engine was noticeably smoother and felt more powerful.

Whenever I get a used Prius now, I do all three of these things to ensure engine health. I do not know anyone who loves a car that consumes engine oil. However, if yours does, try these mentioned solutions first. I am sure they will all help.

Thank you, everyone, for reading; I look forward to seeing you in the following story. Is a Toyota Camry Hybrid worth buying?

Check out this wild new battery tech that Tesla has and why it will forever change the auto industry.

Peter Neilson is an automotive consultant specializing in electric cars and hybrid battery technologies. He holds a Bachelor of Science in Automotive Service Technology from Weber State University. Peter can be reached on Linkedin and you can tweet him at The_hybrid_guy on Twitter. Find his page on Facebook at Certified Auto Consulting. Read more of Peter's stories at Toyota news coverage on Torque News. Search Toyota Prius Torque News for more in depth Prius coverage from our reporters.


Kevin Burchmore (not verified)    May 5, 2021 - 7:14PM

Bottom line is a prius is no more susceptible to oil consumption than any other car when not properly maintained.nothing to do with being a hybrid, follow the schedule and you will never have a issue I have had 3 and never had this problem

Kevin Burchmore (not verified)    May 5, 2021 - 7:15PM

Bottom line is a prius is no more susceptible to oil consumption than any other car when not properly maintained.nothing to do with being a hybrid, follow the schedule and you will never have a issue I have had 3 and never had this problem

Cesar (not verified)    May 6, 2021 - 10:10AM

I have had four Toyota, and three of them gave me trouble always taking care of their maintenance, this super durable toyota is more than a myth that is why a while ago I bought it

Jay ose (not verified)    May 6, 2021 - 12:18PM

We bought a 2010 Toyota Prius new we serviced the engine every 6000 miles at the Toyota dealership instead of the 10,000 recommended by the factory our Prius started using oil at 80,000 miles and it used almost a quart every 2-3 weeks just local commuting Toyota has a problem with oil consumption with Prius we had to sell his car to discount just to get out from this oil guzzler

John (not verified)    July 22, 2021 - 4:58AM

In reply to by Jay ose (not verified)

It is a design flaw in 2010-2012 engines. 2013 has revised head gasket, 2014 revised piston design, 2015 revised piston and piston rings design. So, overall 3rd generation Prius has wide range of reliability. 2013-2015 is way more reliable than the previous year. Unfortunately, that's why we usually want to avoid 1st year of any generation. Fortunately, the 4th generation has much less issues since it leaned from 3rd generation flaws. Only very minor problems in 2016 Prius.

Frank (not verified)    May 7, 2021 - 8:03AM

Found this new engine that will make the world environmentally better from CV Motion Tech. Using the existing worldwide infrastructure, if all products switch to this engine worldwide, could have a significant impact for the better. This is a Very Unique Engine! All should check it out.

Barry M (not verified)    May 8, 2021 - 6:38PM

What do u think about Guaranteed To Pass Emissions additive? When I ran it in my 97 4cyl Camry, I'd pull the plugs and all carbon was burnt off (clean). I own a gen4, should I be concerned ALSO?? I change MY oil every 5,000 or 6 mos whichever comes first.

Michael (not verified)    August 19, 2021 - 4:20PM

Could you post a picture or video of where to spray the CRC Turbo and Intake Valve Cleaner in? I know it should be done after the MAF sensor...

Corryn Wiggins (not verified)    January 17, 2022 - 5:54PM

Hello, my 2008 Prius’ battery has recently gone bad and we are looking to sell it. It’s in good condition and has about 170,000 on it. Do you have a price that you think it would go for?

John (not verified)    January 18, 2022 - 1:35AM

In reply to by Corryn Wiggins (not verified)

if the rest of the car is still good, you can buy a used battery for about $1000 with warranty and sell it 500 more than market kbb price. Otherwise you can sell a is minus $1000 kbb price