i have a new 2002 C5,which replaces my 99 C5. The 2002 has low oil pressure when at hot idlecompared to my 99. At warm/hot idle i am only showing 20-23 psi of oil pressure, is this normal, my 99 under the same conditions would read 30 psi, Has GM modified the oiling system since 1999, or do I have a low pressure condition, thanks for all replies.
Re: seemingly low oil pressure on a 2002 C5 (cares)
Here's what mine runs: 36 PSI @ idle and 48 PSI @ 2000 RPM, water temp.-196, oil temp.-199. This is with 400 miles and the original oil. I have been keeping track because I want to see the difference when I change the oil to 10W-30 mobil1 and the UPF-44 filter. I will change the oil at 500 miles. Unfortunately the weather sucks so that might be a while longer. :cheers:
Re: seemingly low oil pressure on a 2002 C5 (HoTRocks)
My oil pressure was low in my 2001 coupe at first as well. Like the others have said, it went up after my first oil change, using the UPF44 filter. I don't know if it was the filter or what, because this is the only filter I have used. There is a wide range of normal operating pressures, so I wouldn't worry too much about it.