How is it to find the CI4 instead of the new CJ4?
I have been only seeing the CJ4
Also have noticed that my oil reads 80psi cold and around 40psi hot at an idle running 15-40w.

 

I use 15x40 AMSOIL in my 96 2500,also plug in block heater when it goes below 20f. I only use syn oil in all my cars,trucks,m/c,lawn equipment.
They run cooler in the summer,start with less drag in winter.With extended change interval saves lots of $$.

 

I believe that is normal oil pressure readings, as I get the same thing. I run Valvoline Blue CI-4+ 15w40, but I will be switching to 5w40 Valv Blue Extreme next oil change.

-Chris

 

+1

Nik

 

CJ4 is even better. I doubt there's much of the CI whatever stuff left around by now.

 

65-70 psi! i had a manual gauge for a while and my pressure was only about 40 psi driving and about 25 at idle.

 

mine idles at 50 psi and would go up to 80 when rev'd up
that was when checking it right after the engine swapt

 

so i need a new oil pump?

 

i dont know, how many miles on the engine? the one i'm speaking of only has 127k on it

 

225K or more the odometer quit awhile back.

 

Stacked- if you run a diesel rated oil, 10w30 will be just fine.

Put a mechanical gauge on your engine to check it. There is a second 1/8NPT outlet at the top of your oil filter adaptor. Hook it up, and fire the engine up. 80spi at cold idle isnt unheard of- last 3 I've had were in that range. As the oil heats up and thins, it will drop. 40 psi running/ 25psi idle is still quite acceptable for the oil pressure, provided that is hot/ warmed up. The book calls for something ridiculous like 10-15psi hot idle pressure. You shold be fine at 225K+. If it'll make you feel better, you can replace the pump, but I wouldnt worry about it too much.

 

Personally,

I run Chevron Delo- look up their website on the 15W40. Good stuff, Isosythetic with low parrafin. You get alot of synthetic attributes in a diesel rated oil without the huge cost. Avaliable at Wallyworld. Oh, chevron actually REFINES their oil unlike so many of theses bottled brands.

These trucks weren't designed around the latest 2007 oil spec. I think you'll find your manual states CH-4 or better oil.

Michael

 

That's fine for a warm engine. On a cold start the thick oil causes high oil pressure.

 

im running rotella 10w-40 right now but will probably be changing to mobile1 15w-50

 

Actually, it's CD or CE (with the corresponding "S" level- I think SG), depending on which year you have.

That is why I dont see all the fuss over engine oil. They were designed to run on plain old oil SEVERAL categories back, and they are proven to go a million miles or more doing so. There is some debate over whether the CJ4 is as good for the old engines as the new CJ4, but either one will do better than the stuff that came out in 1991. Put the expensive oil in an engine that wont go a million miles and needs all the help it can get, like a gasser.