that is a fine choice for a synthetic. you have less risk of damage with a synthetic than conventional dino oil. that weight is also fine for use year round.

Quote Originally Posted by bmw_ryder
mobil 5w-40 also,but i'm afraid that it's very thin for my type of engine,and probably the engine will "eat"it sooner.
The idea is:can i use an synthetic oil in my M20 engine,without any risc of damaging the engine?