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Old 05-18-2017, 01:09 PM   #1
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Drives: Yaris
Join Date: May 2017
Location: Ireland
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Car burning oil and compression results are good


I am just a new member here. I have a Yaris French Built 2008 Car with engine size is 1L. When I accelerate hardly, a lot of grey/blue smoke coming out. I did compression test. The reading are #1 = 200, #2 =205, #3 =200 PSI. No smoke at cold start up in the morning or siting for a long time. Coolant level is not change.

I am thinking that possibility of the oil control rings are worn.

Do you have any suggestion on my issue?
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Old 05-18-2017, 10:17 PM   #2
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Drives: Yaris 06 - 5dr hatchback
Join Date: Aug 2015
Location: Birmingham, UK
Posts: 63
What kind of oil usage per thousand miles are you seeing? My 1 litre is burning about 600-700ml per 1000 miles and has been for some time. Toyota's have issues with oil burning and piston rings. Toyota "claim" its not a concern unless its more than 1 litre per thousand miles!

- Yaris 2006, 1.0, 5 door hatchback "Betty" - 130,000 miles
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Old 05-20-2017, 09:10 PM   #3
Drives: 2009 5-door, 5-speed
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Location: White Rock BC
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Since it doesn't smoke on startup, and smokes when hard on the throttle, it is probably the piston rings.
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Old 05-21-2017, 09:49 AM   #4
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I'd also check your PCV valve to make sure it isn't clogged. That would cause ecsessive crankcase pressure and push oil past the rings.
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