Cold Oil pressure

[nefarious7907]

So I finally got around to getting my SW Oil pressure gauge hooked up. And although it was about 30 degrees outside it was reading some 90psi on a stone cold start is that normal? after a minute or so it was down to 75psi at idle and dropping.

I am using non synthectic BMW 15-40w oil, and I have a rather large oil cooler fitted to my m20.

[nando]

yes

[nefarious7907]

::sigh of relief::

[JRKOUPE]

op

yes

+1

[PeaveyBassist]

Mine at cold start is around 60-70psi. When it warms up (15 min or so later), around 20psi at idle.

[nando]

you oil warms up in 15 minutes? my coolant takes longer than that to warm up...

it also depends on what you're using - lighter oil will have lower pressure on cold starts than thick stuff.

[PeaveyBassist]

Well in 15 minutes probably its about 20psi. Coolant is warmed up in 15 though :) When my oil temp is around 190deg F pressure at idle is about 20 psi.

[nefarious7907]

It takes almost 20 minutes to get my oil temp up to 170 degrees on a 90 degree day, I havent seen my oil temp gauge go past 150 now that its freezing out. And when oil is 150 degrees I am getting around 50lbs of oil pressure.