2010 Prius - What oil to slow down burn?

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Originally Posted By: dparm
I would perform a compression or leakdown test to figure out why it is burning oil.


This. Something is very wrong if a 3 year old vehicle is burning that much oil. Find the weak cylinders, use the piston soak of your choice. You might want to try Kreen from Kano Labs. Don't bother with the AutoRX garbage. If it's still under warranty, make Toyota fix it.
 
I think the problem is the 10,000 mile OCI that Toyota is giving for their new 0w20 oil. I'll never do a 10,000 mile OCI. I have had 5 Toyota engines and even one known for oil consumption and none consume any oil. I believe it is because I do 5000 mile OCI's with synthetic oil. The engines stay clean and you don't have the ring issues. My dealer service manager has told me this for years and I believe he is correct.
 
Originally Posted By: Danh
How has the car been maintained? Is it possible extended OCIs as Toyota suggests or a missed maintneance interval may have allowed sludge to develop in rings, and other bad places? If this is a possibility, a few abbreviated OCIs using Mobil1 HM 5w/20 may be worth a try.


I agree...I recommend 3000 mile OCI's with PP or PU for the next 15000 miles and see what happens.
 
Originally Posted By: The Critic
Unfortunately, per the manual, that is still an acceptable level of oil consumption.

This is a situation where it is best to simply trade-in the vehicle.

My 2011 is at 59k and consumes about 1/3 qt over the 10,000 mile interval. I do floor it at nearly every stop light (from day 1) so perhaps the harder use is keeping the oil consumption in check?


Go to 5000 with PP and see what happens.
 
Originally Posted By: NHGUY
Shame you couldnt run it in electric only mode....you wouldnt burn ANY gas or oil!


But he'd never be able to get any farther than down the block before he had to turn around and come back to charge it.
 
I have been doing 10,000 OCI when Toyota said you could. Ill try PP 0W20 and do 5K intervals... See if any difference and change to 0W30 after.
 
Originally Posted By: xBa380
I have been doing 10,000 OCI when Toyota said you could. Ill try PP 0W20 and do 5K intervals... See if any difference and change to 0W30 after.


Well, toyota also said 5,000 miles severe service and oil with higher viscosity is better suited at high temp/high load.
 
So should I do PP 5W30 or 0W30 instead? And run at shorter intervals? Might cut it back to a few rounds of 5,000 for him and see if we get any improvement. I have a feeling he will be unloading it, but just in case he doesn't...

Appreciate the help guys. Again, sorry for the repeat post. Totally forgot I made that a few months back.
 
Originally Posted By: xBa380
So should I do PP 5W30 or 0W30 instead? And run at shorter intervals?

What not try running a few shorter intervals of maxlife 5w30 and see how it goes. It would be cheap enough to try and the results would be interesting. It would also be really interesting if you were to monitor your fuel consumption and report if there's any noticeable hit.
 
Originally Posted By: xBa380
My dad has a 2010 Prius with 85,000mi on it. It burns almost 1qt every 1,500mi or so. We got the PCV changed but it made no difference. The oil change is coming up so I want to try a different oil to maybe control the consumption a little.

What oil to use though?

It takes 0W20.... I have been using Toyota 0W20 the entire time for this car. I thought of going to PP 5W20 or maybe 5W30?

Not good with the grades and what would be perfectly safe and all that. Need some help
smile.gif


Thanks!

3-year-old Toyota with less than 100,000 miles on it, burning too much oil. That engine requires a repair, not oil recommendation. Try to see if you can have it repaired under warranty while you can.

My 28-year-old Toyota with 249,000 miles on it burns virtually no oil with Toyota 0W-20 SN since I replaced the valve-stem oil seals.

Perhaps one of the valve-stem oil seals never clicked into place or broke during installation at the factory. Remove each spark plug and check for oiliness. There should be no oil on it whatsoever. There should also be little oil deposits (gray ash from additives). If it's oily, you have a broken or unseated valve-stem oil seal. Have it replaced at the dealer under warranty. If it's not oily but you have a lot of ash, it could be a ring issue.
 
Originally Posted By: Gokhan
3-year-old Toyota with less than 100,000 miles on it, burning too much oil. That engine requires a repair, not oil recommendation.


Yep but playing with the oil cheap.
smile.gif


To OP. Has your oil consumption really increased from 1 quart per 4000 miles to 1 quart per 1500 miles as implied from your post 6 months ago? If so then that's pretty alarming. http://www.bobistheoilguy.com/forums/ubb...986#Post2763986
 
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Originally Posted By: Gokhan
Originally Posted By: xBa380
My dad has a 2010 Prius with 85,000mi on it. It burns almost 1qt every 1,500mi or so. We got the PCV changed but it made no difference. The oil change is coming up so I want to try a different oil to maybe control the consumption a little.

What oil to use though?

It takes 0W20.... I have been using Toyota 0W20 the entire time for this car. I thought of going to PP 5W20 or maybe 5W30?

Not good with the grades and what would be perfectly safe and all that. Need some help
smile.gif


Thanks!

3-year-old Toyota with less than 100,000 miles on it, burning too much oil. That engine requires a repair, not oil recommendation. Try to see if you can have it repaired under warranty while you can.

My 28-year-old Toyota with 249,000 miles on it burns virtually no oil with Toyota 0W-20 SN since I replaced the valve-stem oil seals.

Perhaps one of the valve-stem oil seals never clicked into place or broke during installation at the factory. Remove each spark plug and check for oiliness. There should be no oil on it whatsoever. There should also be little oil deposits (gray ash from additives). If it's oily, you have a broken or unseated valve-stem oil seal. Have it replaced at the dealer under warranty. If it's not oily but you have a lot of ash, it could be a ring issue.


That's along the lines of what I'm thinking: there has to be a manufacturer defect in that motor.
 
Originally Posted By: jfking106
Originally Posted By: Gokhan
Originally Posted By: xBa380
My dad has a 2010 Prius with 85,000mi on it. It burns almost 1qt every 1,500mi or so. We got the PCV changed but it made no difference. The oil change is coming up so I want to try a different oil to maybe control the consumption a little.

What oil to use though?

It takes 0W20.... I have been using Toyota 0W20 the entire time for this car. I thought of going to PP 5W20 or maybe 5W30?

Not good with the grades and what would be perfectly safe and all that. Need some help
smile.gif


Thanks!

3-year-old Toyota with less than 100,000 miles on it, burning too much oil. That engine requires a repair, not oil recommendation. Try to see if you can have it repaired under warranty while you can.

My 28-year-old Toyota with 249,000 miles on it burns virtually no oil with Toyota 0W-20 SN since I replaced the valve-stem oil seals.

Perhaps one of the valve-stem oil seals never clicked into place or broke during installation at the factory. Remove each spark plug and check for oiliness. There should be no oil on it whatsoever. There should also be little oil deposits (gray ash from additives). If it's oily, you have a broken or unseated valve-stem oil seal. Have it replaced at the dealer under warranty. If it's not oily but you have a lot of ash, it could be a ring issue.


That's along the lines of what I'm thinking: there has to be a manufacturer defect in that motor.


Still if it's consuming less than a qt in a 1000mi, Toyota is going to tell him to take a hike...

I'd try the M1 5W-30 HM to see if it improves...
 
Originally Posted By: TFB1
Still if it's consuming less than a qt in a 1000mi, Toyota is going to tell him to take a hike...

I'd try the M1 5W-30 HM to see if it improves...

Not if he can prove that something needs to be repaired. I would check the spark plugs. If one of them is wet with oil or showing some other unusual problem, Toyota is required to repair that engine under drivetrain warranty. It's for the same reason they are required to repair any oil leak, not just those that leak 1.8 quarts or more in 1,000 miles.

HM oils don't really help with valve-stem oil seals or rings, especially if the valve-stem oil seal is broken, unseated, or too worn. Also, I would stick with the recommended viscosity.
 
There was a very interesting Prius post on another forum, from a guy switching to M1, 10W-30 to help reduce consumption. From what I remember, It worked well, the engine was a bit quieter and MPG's actually went up a bit.

He piled on the miles, and had great results.
 
Originally Posted By: Cujet
There was a very interesting Prius post on another forum, from a guy switching to M1, 10W-30 to help reduce consumption. From what I remember, It worked well, the engine was a bit quieter and MPG's actually went up a bit.

He piled on the miles, and had great results.


Any link?

Also when you say "switched", what did he switch from. Switching from 0w20 to 10w30 could be quite different than switching from 5w30 to 10w30. I switched from an energy conserving oil (2.9 HTHS ACEA A1) to a non energy conserving one (3.5 HTHS ACEA A3/B4), and I can't detect even the slightest change in fuel economy, and not for want of trying and carefully measuring over many tankfuls. This is in a warm climate though, I accept that results in a cold climate may differ.

I'd like to see the OP try a high viscosity for purely selfish personal reasons. I'd like to see another data point on viscosity versus fuel consumption.
smile.gif
 
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1qt.1000miles?
Does anyone else find this ironic for a Prius/Hybrid?
So much for reducing petroleum consumption and greenhouse gas emissions
48.gif


But seriously, is it possible to do a compression test on this engine?
 
Originally Posted By: jrustles
1qt.1000miles?
Does anyone else find this ironic for a Prius/Hybrid?
So much for reducing petroleum consumption and greenhouse gas emissions
48.gif



Let's see: The Prius uses 1 quart of oil for every 1 quart of gas. Somehow things aren't balancing out here.
wink.gif
 
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