Since there's been oil topics of late, thought I'd throw my $0.02 in.

This is information taken from our racecar. Take it with a grain or two of rice, but it's data. Most people already know this, but as the temperature goes up, the oil pressure will go down. Yes, the probe is on water temp, and not oil temp, but if one's hot, the other will be, too.

Just another reason to watch water temps during summer.

The reference point I'm using is at the peak before the shift, at 2.10 seconds.

July 23, 2011:

first pass:
water: 159
oil PSI: 76

second pass:
water: 165
oil PSI: 71

third pass:
water: 162
oil PSI: 74

fourth pass:
water: 167
oil PSI: 72

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The day we made the pass in my sig:

Reference point is right before the shift, at 1.80 seconds

first pass:
water: 157
oil PSI: 76

second pass:
water: 161
oil PSI: 74

third pass:
water: 154
oil PSI: 77