(I get to use the tech discussion! lol..) Hey, guys.. I just changed the oil in the I-6 in my 2000 XJ. Before I changed the oil, I had noticed that the oil pressure would sit at 20, and then rise to 40 or above once I started drivin'. I just chalked it up to thinner oil from having been, well, "in circulation" for awhile.. Now, after I changed it, it still sits at 20 when i'm idling, and picks up once i start to drive.. Is this normal? should I be worried? I used Quaker State Defy 10w-30 and a pur-o-lator filter, if that helps.

 

That is normal. Pressure will be lowest at idle.

As long as you are within these specs, you are okay:

*Not less than 13 psi at HOT idle

*Between 37-75 psi OVER 1600 rpms

 

THANKS!!! Saved me a lot of worry and hair tearing-out..

 

It is perfectly normal.

 

Yup, normal, also a good rule of thumb no matter what you drive is to have around 10psi oil pressure for every 1000 rpm.