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Hey everyone, title says basically what’s going on here. I have a 2009 Toyota Corolla with the 1.8L engine and 60,000 miles, and it burns approximately 1 quart of oil every 2000 miles. It does not appear to be leaking out anywhere, so I’m assuming it’s going to be the oil control rings, or the PCV system. It burns slightly less with conventional oil, and burns more with full synthetic, both being 5w-20.
Anyone have some advice on what I should do? I’m thinking about replacing the PCV valve, but that requires taking the intake manifold off, and a few other things.
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This is a known issue… There is a TSB out about it… Take it to your Toyota dealer… Your ECM needs a re-flash… Since you are under 80K this will be covered….
http://www.toyotapart.com/1ZR-FE_ENGINE_OIL_CONSUMPTION_T-SB-0145-08.pdf
T-SB-0145-08.
Applicability:
2009 Toyota Corola/Matrix with 2ZR Engine, and Transmission(s): 5MT, 4AT. VDS(s)Corolla: BL40E, BU40E; VDS(s)Matrix: KU40EIntroduction:
Under certain driving conditions SOME 2009 model year Corolla and Matrix vehicles may exhibit engine oil consumption. The Engine Control Module/ECM logic has been modified to improve this condition. Use the following repair procedure to address customer concerns.Warranty Information:
OP Code: EG8034 Description: Recalibrate ECM Engine Time: 0.6 OFP: 89661-##### T1: 11 T2: 99Applicable Warranty:
This repair is covered under the Toyota Federal Emission Warranty. This warranty is in effect for 96 months or 80,000 miles, whichever occurs first, from the vehicle’s in-service date.
Warranty application is limited to correction of a problem based upon a customer’s specific compaint.[quote=”ToyotaKarl” post=77420]This is a known issue… There is a TSB out about it… Take it to your Toyota dealer… Your ECM needs a re-flash… Since you are under 80K this will be covered….
http://www.toyotapart.com/1ZR-FE_ENGINE_OIL_CONSUMPTION_T-SB-0145-08.pdf
T-SB-0145-08.
Applicability:
2009 Toyota Corola/Matrix with 2ZR Engine, and Transmission(s): 5MT, 4AT. VDS(s)Corolla: BL40E, BU40E; VDS(s)Matrix: KU40EIntroduction:
Under certain driving conditions SOME 2009 model year Corolla and Matrix vehicles may exhibit engine oil consumption. The Engine Control Module/ECM logic has been modified to improve this condition. Use the following repair procedure to address customer concerns.Warranty Information:
OP Code: EG8034 Description: Recalibrate ECM Engine Time: 0.6 OFP: 89661-##### T1: 11 T2: 99Applicable Warranty:
This repair is covered under the Toyota Federal Emission Warranty. This warranty is in effect for 96 months or 80,000 miles, whichever occurs first, from the vehicle’s in-service date.
Warranty application is limited to correction of a problem based upon a customer’s specific compaint.[/quote]The car was re-flashed a year ago for the exact same thing. Problem hasn’t changed that much. If I remember correctly, it burnt a quart every 1800 miles before the flash, now it’s around 2000 miles.
Since the flash has already been done, try switching to a conventional 5w-30 oil and watch your consumption…
-Karl
[quote=”ToyotaKarl” post=77425]Since the flash has already been done, try switching to a conventional 5w-30 oil and watch your consumption…
-Karl[/quote]
I really should have added info to my post.. Anyways, my dad and I tried doing a 50/50 mix of 5w-20 and 5w-30, and that showed no benefits (other than conventional oil burning slightly less) I didn’t want to try 5w-30 full, because I don’t want to have the oil pump try any harder.. Going into winter anyways.
I found another TSB. If the tsb does not apply.do a compression test
to test the rings and valves.http://www.toyotanation.com/forum/150-2nd-generation-2009/304437-2009-toyota-matrix-corolla-tsb.html
A quart every 2000 miles isn’t too bad. You could try some of the old tricks, like thicker oil. I know the car makers don’t recommend it, but that’s mostly, I think, just so they can claim a fraction more of a MPG. It’s up to you to decide whether a small fraction of a MPG is worth a quart of oil. Let’s try the math: if we assume 20 weight oil will give you 1% more MPG, and you get 20 MPG, after 2000 miles the thick oil will have used 100 gallons, and the new thinner oil will have used 99 gallons. Hmm, that’s a savings of like $3.50, at the cost of maybe an extra quart of oil burned, about $3.50….. About the same by this reckoning.
The engine doesn’t knock at all on startup (as per the TSB), and I don’t think the compression is messed up at all, due to the car still having a good bit of power for a 4 cylinder, and still getting 38+ MPG… I’m stumped as to what’s wrong. Only other option is the oil control rings, or the PCV valve.. At least I think those are the only options.
Anyone have any idea? It’s not a critical problem with the car, I’d just like to drive it without worrying about adding oil every 2000 miles.
[quote=”ToyotaKarl” post=77420]This is a known issue… There is a TSB out about it… Take it to your Toyota dealer… Your ECM needs a re-flash… Since you are under 80K this will be covered….
http://www.toyotapart.com/1ZR-FE_ENGINE_OIL_CONSUMPTION_T-SB-0145-08.pdf
T-SB-0145-08.
Applicability:
2009 Toyota Corola/Matrix with 2ZR Engine, and Transmission(s): 5MT, 4AT. VDS(s)Corolla: BL40E, BU40E; VDS(s)Matrix: KU40EIntroduction:
Under certain driving conditions SOME 2009 model year Corolla and Matrix vehicles may exhibit engine oil consumption. The Engine Control Module/ECM logic has been modified to improve this condition. Use the following repair procedure to address customer concerns.Warranty Information:
OP Code: EG8034 Description: Recalibrate ECM Engine Time: 0.6 OFP: 89661-##### T1: 11 T2: 99Applicable Warranty:
This repair is covered under the Toyota Federal Emission Warranty. This warranty is in effect for 96 months or 80,000 miles, whichever occurs first, from the vehicle’s in-service date.
Warranty application is limited to correction of a problem based upon a customer’s specific compaint.[/quote]What I want to know is what the reflash does. What I want to know is how changing ECM parameters can fix a normally mechanical issue.
I would run both a dry and wet compression test and add one caveat.
It’s possible to have absolutely great compression readings and still have an oil consumption problem due to piston rings; generally the oil control ring, or wiper ring as it may be called.
Regarding that scenario and a best example, a Subaru in the shop had 185 PSI on each of the 4 cylinders. Oil consumption was 1 quart per 10 miles; and that’s not a typo. Even worse, all of that oil consumption was on one cylinder only and it was due to a glazed cylinder wall.
I’m kinda curious how a ECM flash can change oil consumption!
Do they have some way of lowering the manifold vacuum so the PCV system sucks less hard on the crankcase?
[quote=”grg8888″ post=77541]I’m kinda curious how a ECM flash can change oil consumption!
Do they have some way of lowering the manifold vacuum so the PCV system sucks less hard on the crankcase?[/quote]
That’s what I want to know.
If we knew what the re-flash does it might give a hint to why that engine has a oil consumption issue.
[quote=”Raistian77″ post=77511][quote=”ToyotaKarl” post=77420]This is a known issue… There is a TSB out about it… Take it to your Toyota dealer… Your ECM needs a re-flash… Since you are under 80K this will be covered….
http://www.toyotapart.com/1ZR-FE_ENGINE_OIL_CONSUMPTION_T-SB-0145-08.pdf
T-SB-0145-08.
Applicability:
2009 Toyota Corola/Matrix with 2ZR Engine, and Transmission(s): 5MT, 4AT. VDS(s)Corolla: BL40E, BU40E; VDS(s)Matrix: KU40EIntroduction:
Under certain driving conditions SOME 2009 model year Corolla and Matrix vehicles may exhibit engine oil consumption. The Engine Control Module/ECM logic has been modified to improve this condition. Use the following repair procedure to address customer concerns.Warranty Information:
OP Code: EG8034 Description: Recalibrate ECM Engine Time: 0.6 OFP: 89661-##### T1: 11 T2: 99Applicable Warranty:
This repair is covered under the Toyota Federal Emission Warranty. This warranty is in effect for 96 months or 80,000 miles, whichever occurs first, from the vehicle’s in-service date.
Warranty application is limited to correction of a problem based upon a customer’s specific compaint.[/quote]What I want to know is what the reflash does. What I want to know is how changing ECM parameters can fix a normally mechanical issue.[/quote]
I was told the reflash changes the valve timings (VVT-I) and makes it burn less oil. Didn’t do much, if anything at all.[quote=”Bluesnut” post=77523]I would run both a dry and wet compression test and add one caveat.
It’s possible to have absolutely great compression readings and still have an oil consumption problem due to piston rings; generally the oil control ring, or wiper ring as it may be called.
Regarding that scenario and a best example, a Subaru in the shop had 185 PSI on each of the 4 cylinders. Oil consumption was 1 quart per 10 miles; and that’s not a typo. Even worse, all of that oil consumption was on one cylinder only and it was due to a glazed cylinder wall.[/quote]
If it was localized to 1 cylinder, then I’m sure the spark plug would be pretty fouled.. I replaced my spark plugs about 1000 miles ago, and they were all evenly covered in white/brown residue. I can post pictures if anyone would like to see.[quote=”grg8888″ post=77541]I’m kinda curious how a ECM flash can change oil consumption!
Do they have some way of lowering the manifold vacuum so the PCV system sucks less hard on the crankcase?[/quote]
Since this is a VVT engine, the valve timing can be adjusted by the re-programming of when the VVT actuator activates… I am not for certain why this SHOULD help, but sometimes it does and sometimes it doesn’t….
It has been postulated that the changing of the valve timing lowers the pressure in the crankcase and temperature which helps the oil not to vaporize as much…. Don’t quote ME on that though…. 😛
If it were me, I would run 5-30…. Toyota did the 5-20 to meet CAFE standards in the US and the rest of the world runs it on 5-30….
just my 2 cents…
-Karl
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