would running thicker oil cause lower oil pressure? - SRT Forums

RVDSRT4 · 10-23-2009, 02:29 PM

I use 20w-50 in my recently built motor and I am noticing at times that my oil gauge will sometimes drop to 0 from 5 when the cams get a bit of lope to them. I am wondering if it is the thickness of the oil or just something to do with the crane 18's. If I blip the gas even a little it goes back up to normal. I have a new oil pump from DCR so assuming that not an issue. I have the gauge in the head.

71ValiantSRT-4 · 10-23-2009, 05:57 PM

The gauge in the head will cause the psi to read lower to begin with.

nutz · 10-23-2009, 06:30 PM

20w-50 will break your oil pump in no time

wtf

unless your motor is built with loose tolerances and enlarged oil passeges DO NOT us another oil, this places a TON of stress on the oil pump

nutz · 10-23-2009, 06:31 PM

waits for crying partout thread

Hi N Mity · 10-23-2009, 06:35 PM

buy a mechanical gauge and see if the pressure changes....maybe the sending unit or gauge itself is bad

to answer your question, thicker oil will cause higher oil pressure. what does your engine builder recommend for viscosity?

viper20220k · 10-23-2009, 06:35 PM

I have been running 15w-50 for over 60k miles with nothing special done to my oil pump, I have not seen any issues yet.

nutz · 10-23-2009, 06:39 PM

Quote: Originally Posted by viper20220k

I have been running 15w-50 for over 60k miles with nothing special done to my oil pump, I have not seen any issues yet.

then we should all do it WTF do engineers know

julius717 · 10-23-2009, 06:56 PM

Quote: Originally Posted by nutz

20w-50 will break your oil pump in no time

wtf

unless your motor is built with loose tolerances and enlarged oil passeges DO NOT us another oil, this places a TON of stress on the oil pump

uhhh sure about that? dcr recomends 20-50 on all their built motors. i been using it for about 3-4 years now myself.... but of course i have every DCR part in my motor

nutz · 10-23-2009, 07:16 PM

Quote: Originally Posted by julius717

uhhh sure about that? dcr recomends 20-50 on all their built motors. i been using it for about 3-4 years now myself.... but of course i have every DCR part in my motor

bearing clearences are different, and yes I am 100% sure puting thicker oil in a stock motor is the stupidist thing ever ...ask DCR

al it will do is lower needed flow and rob HP by overdriving the pump

I'm not here to educate fucking ricers who thing putting race oil in their car is cool, get a freaking grip people

lyncoo · 10-23-2009, 07:17 PM

it calls for 5w30 good luck

lyncoo · 10-23-2009, 07:19 PM

race engines that use 20w50 are only good for one race. before a teardown or rebuild.

RVDSRT4 · 10-23-2009, 07:19 PM

Quote: Originally Posted by RVDSRT4

I use 20w-50 in my recently built motor and I am noticing at times that my oil gauge will sometimes drop to 0 from 5 when the cams get a bit of lope to them. I am wondering if it is the thickness of the oil or just something to do with the crane 18's. If I blip the gas even a little it goes back up to normal. I have a new oil pump from DCR so assuming that not an issue. I have the gauge in the head.

since some people did not read