As oil warms up it gets thinner, and the pressure will drop as a result
of this as the oil finds it easier to slip past bearings etc. Ths
pressures you quoted are fine, but I would suggest you go for a 10-20
mile drive to get the oil up to working temperature and note the
pressures again.
John
You wrote:
>
>Today was the longest time I have had my car running. Up until now
>(other than a few block drive 2 weeks ago) all I have done is idle in
>the driveway. At idle the oil pressure has been a pretty consistant
45
>at 800 RPM, it would go to about 75 at 3500 RPM.
>
>Today I drove it about 1 mile and idled for about 10 minutes. When I
>was done, I noticed that at 800 RPM idle, the OP was just over 25.
When
>I go to about 3500 RPM the OP would go to about 65-70..
>Why the change and does this mean I have problems with the engine.
>Rob
>
>
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