Anybody have a factory manual or Chiltons that could look up the oil pressure spec? I am curious what psi and rpm the spec is for the late model modular engines that takel 5w20 oil. Thanks

 

4.6L Oil pressure (@ 2000 rpm — 93°C (200°F)) 275.8-417.1 kPa (40-75 psi).
5.4 Oil pressure minimum at 2,000 rpm (engine at normal operating temperature) 275.8-413.7 kPa (40-60 psi)

 

Thanks Dave. If they are getting that pressure with the 5w20 oil, then it really must be true that the clearances are tighter in the new engines. Interesting Ford back specs my '95 F150 straight six for 5w20, but I am running 10w40 and just getting within spec at 45 psi (spec 40-60 @ 2000 hot). I suppose even some of these 5w20 engines may have to step up to a 30 weight after enough miles.