Hey guys, i am looking into buying some Auto Meter 2 5/8" Pro Comp Ultra-Lite Mechanical gauges, and was wondering which ones to get...(for oil pressure, should i get 100 psi or 200 psi one??...(how high does the oil pressure get on average)?...also, for fuel pressure there is a 15 psi or 100psi?...what does everyone think...thanx