Oil pressure vs viscosity vs temp

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Q45tech
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Posts: 14296
Joined: Tue Apr 30, 2002 3:19 am
Car: 1990 Q45 342,400 miles 22 years ownership with original engine
1995 G20t 5 speed 334,000 miles 16" 2002 wheels - 205/50/16 Sr20ve vvl

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http://www.delphi.com/pdf/tech...1.pdf

Interesting concept if you have accurate oil temp and pressure sensors.

Good charts on oil viscosity changes vs temp vs operating time...........as the lighter fractions boil off.

Anyway used oil has a higher oil pressure at idle vs brand new oil at the same temperature.

Members may remember my recommendation to check bearings [oil pressure] with brand new oil at highest operating temperature

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