Questions come up about oil pressure on the twin cam motors from time to time. Your oil pressure, according to factory Harley Davidson specs is as follows: With a warm engine, oil pressure at cruising speed of 55 m.p.h. and up should be 30 - 36 p.s.i. At idle, at least 10 p.s.i. With initial start-up being around 44 p.s.i.with the colder oil temps.