Originally Posted By: chrisri
FPT c635 and c633 are specified with Tutela Gearforce 75w GL4 fluid with additional Fiat specifications.
This oil is a synthetic already. In general Petronas Europe (ex FIAT lubricanti) makes high quality products.
If you want to try something else I would suggest Castrol GL4 oil.
Very hard to find any Petronas products in the USA. I can't find one dealer here, I wonder if there is anyone here in the USA that carries
Tutela products?