burning oil

[joemcc]

My mates s15 is burning oil on overrun down a hill mostly and normal running temperature . We have changed my turbo into his car to rule out it and it's not the turbo, compresson 145psi across all cylinders, changed out pcv value not it either could it possibly be valve stem seals.
Cheers

 

[Auss15]

Yes, what sort of mileage on it....

 

[joemcc]

There is over 100thousand miles on it now

 

[Auss15]

I would say that valve stem seals are hard...

 

[joemcc]

Yea it's kind of the only thing left he is going to get a leek down tester just to see for sure.