Hi all, i just installed my defi oil pressure gauge today... i am wondering what's the normal oil pressure should be? @ idle and when i am in gear driving? rite now when its warm its @ around 20psi @ idle and the warning "beeps" come on... when i am in gear driving is @ 40 - 60psi... is that normal?? and how low should I set the warning to be? 15psi? or even lower?