Pedro
٩(͡๏̯͡๏)۶
If the filter is full, your engine is dying anyway.
The folks that design this stuff aren't 1st grade dropouts.
The folks that design this stuff aren't 1st grade dropouts.
Pedro, MY06 in my Impreza NA i use the Subaru 5w30 sythetic. UOA have come back great and the oil hasGood rule of thumb is upgrade your engine = upgrade your oil and OCI.
5W30 is not what you want to run on a modded motor (or racing on a factory motor).