GameboyRMH said:
In reply to z31maniac :
Yeah I've heard of dealers choosing to put in 5W30 on their own before, maybe they just see it as a safer choice these days. After seeing the results of some testing done with measuring oil pressures and temperatures with different viscosities in an FA20, I'm planning to move from 5W30 to 5W40 in the future, it seems that 30 hot viscosity is a bit on the lower side of what would be ideal for track use and 50 for a dedicated track car actually makes a lot of sense.
My engine is bone stock. But lowered/wheels/catback/etc. Didn't the first gen race cars in Japan run 5w-60?