Yeah 0.5 to 0.7 litre over fill has been proven to help mitigate those issues. Only really a concern on track though, mine is overfilled by about half a litre.
GR86 Oil consumption
- Thread starter GRpirate
- Start date
sbc_uk
Totally Hooked
It will be higher cold as more oil drains back into the sump over time. Overfill can be just as bad as having too low oil, but a small amount isn't going to do any harm.
Hi they will show high sometimes if they have been standing for a while. Run the car up to temps then turn it off and sit 5-10 minutes then check it
It's also important that your oil level doesn't get anywhere near the crank. Oil whipped up into a foam doesn't have the same film strength as it should. I don't know how much you would have to overfill to reach that point but I doubt the people giving that advice know either.
Exactly, that’s why I don’t make stuff up and tell others. I work in the world of process and things are tried and tested and written up so everyone knows what to do / follow.
I trust Toyota as they are the originators of the manufacturing process. If you can’t trust them then you can’t trust anyone.
I took my car back in today and they said that they had over filled it so drained some off. Mistakes happen and I’ve got a record now of the oil over fill just in case anything untoward happens but I don’t think it will.
Ok so I have now covered 1250 miles and the car has consumed about 400ml of oil since I’ve been using all of the revs.
Used nothing up to 1000 miles during run in. Seems like now I’m using the revs it is swallowing it. More so that I would have thought.
Does this sound like I have one of these faulty PCV? I’ll contact the dealer if so and they can diagnose.
I remember reading thread about this PCV problem but can’t find it. Could anyone point me in the right direction please?
Thanks
Matt
Used nothing up to 1000 miles during run in. Seems like now I’m using the revs it is swallowing it. More so that I would have thought.
Does this sound like I have one of these faulty PCV? I’ll contact the dealer if so and they can diagnose.
I remember reading thread about this PCV problem but can’t find it. Could anyone point me in the right direction please?
Thanks
Matt
Last edited:
I don't think so, it's pretty normal for some oil consumption on a new engine. I would just monitor for now.
KobayashiMaru86
Totally Hooked
Mine used a little for the first 5k, but that did involve a fast drive to Scotland and back but nothing since. Now on 13k
I’m thinking that now the car is seeing revs and more side movement the internal areas are being covered in oil which is removing some from the sump and depositing it around the hidden parts of the engine.
It wasn’t using anything during run in so clearly wasn’t an issue for 1k miles.
I’ll just keep an eye on it.
I had this issue with a significant blow by during cold starts, dealership changed pcv valve after some verification and me showing that other did the same, issue disappeared.
I keep checking as do not want to give a chance for error.
Also, a friend that has a track brz was having a significant blow by, changed the pcv today and will be testing this Thursday.
I keep checking as do not want to give a chance for error.
Also, a friend that has a track brz was having a significant blow by, changed the pcv today and will be testing this Thursday.
A failed PCV doesn't increase oil consumption by increasing blow by.
The PCV valve should shut at idle as the vacuum in the intake system is too great and would such all the oil from the crankcase. It opens when the vacuum decreases/engine revs increase. When it fails it tends to stick open at idle. It's not really anything to do with blow by.
How did you prove it? I think a have higher oil consumption but not totally sure.
what would be the right term? Some symptoms for a failed pcv are the following;
- Rough acceleration
When you press the accelerator, the engine should rev up and the car should speed up smoothly, but a failing PCV valve can cause rough acceleration. - Blue exhaust gas
Blue smoke from the exhaust pipe indicates that the engine is burning oil, which could be a sign of a PCV valve problem. - Whistling or hissing sounds
A slight blockage in the PCV valve can cause a whistling or hissing sound from the engine. - Oil leaks
A clogged PCV valve can prevent blowback pressure from the cylinders from dissipating, which can over-pressurize the crankcase and lead to oil leaks. You might notice oil spots in your garage or sludge draining from the oil pan when you change your oil. - Excessive oil consumption
If the PCV valve is stuck open, it can draw excess vapors from the crankcase and cause the engine to burn more oil than normal. - Poor fuel economy
A failing PCV valve can cause a decrease in fuel economy
When working with the dealership, started measuring on flat surface, same temperature, also verifying the smoke on the startup. This was about 3 months before changing. Then changed the valve and measured again.
This is one of the cases that is documented to have impact on oil consumption, there are several others that will need to be checked.
It's easy to tell if your PCV valve has failed open. At idle, take your oil filler cap off and place your hand over the opening. If you can feel vacuum the valve has failed open as it should always be shut at idle.
