me and my bro always let our cars warm up for 1 min, if temp needle is right at cold, then drive of slowly, shifting no higher then 3000rpm.. until temp needle is at normal indication. Keeping a auto skyline off boost is quite tricky, because at cold start, its running retarded timing too, so even the slightlest hill means it wants to at least get to 0 vaccuum.
oh we both atm use pennzoil 15w 50w semi syn