46addict
13726548
Is the supercharger somehow changing your bearing and cam journal clearances?
BTW this will be merged into the oil thread.
I see it is here now and that is what I was thinking as well my internals are all the same but I noticed some guys running heavier cause the extra power I think royal purple 5 20 is fine just wanted to get some more input on this mainly cause I'm due for an oil change just don't wanna waste money on it if I need to change
The general justification for running a thicker oil in a boosted engine is if the compressor shares its oil supply with the engine and/or to maintain oil pressure during extended periods of high RPM. As in road racing or 10+ passes down the drag strip.
All of this is speculation though unless you take two viscosity grades in the same engine and compare the overall analysis averages. I would also advocate staying with OEM oil recommendations and would only deviate from that if I was having oil pressure issues in the desert heat.