My 99 5.3 when starting eng cold oil pressure is very low unless rpm is at 1500, after warms up stays at around 40 has 183,000 miles

 

Thank You

 

is oil full? what weight oil is used?

 

yes it is full just changed again castrol high milage 20w50 with lucas oil additive

 

oil is too thick. unless you live in sub zero temps, you should be running 5w30 or 10w30. 20w30 is too thick

 

You will destroy that engine with that oil. It can not circulate it. Put 5-30 in it and see what happens.

 

the only think I put 20-50 in was my harley. Diesel trucks don't use oil that heavy. should help alot to use 5-30. I think maxx ment to thick unless you live on the sun.

 

yeah, sorry lariders. brain ain't functioning so well. my bad

 

I know what you where saying and just got mixed up. I just did not want someone that did not know much about oil to put 20-50 in the truck becuase there where going to alaska this winter. lol Man that would suck.

 

Thanks Guys I will try that and see what happens from thereGreat truck lots of miles got to make it last