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Engine temp & oil pressure
Hi, all,
I recently lower the water/engine temp from 95C to 86C by changing to low temp thermostat and lower thermo fan kick-in temp. And I'm using Redline 10W40, the sensor is placed on top of crankcase(oem sensor location). Before lower it, my oil pressure was: At hot idle: 20 kpa At wot: 70 kpa (maybe limited by regulator?) Now, it's: At hot idle:23 kpa At wot: 75 kpa My question is should I switch to thinner oil to avoid excessive engine wear? Maybe 5W30? PS: Here is some redline oil viscosity data: 05W30: 67@40C 10.9@100C 3.8@150C 10W40: 98@40C 14.6@100C 4.7@150C And for Castrol: 05W30: 72@40C 12.0@100C 3.6@150C 05W40: 84@40C 14.0@100C 3.8@150C Thanks in advance
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MY08 STI 422whp at 1.5bar on E85, built by Diversion Garage, assembled and tuned by EvoR Update from new owner: 375whp at 1.4bar on 98, at Tokyo Motorsport Last edited by s20525xxx; 16-02-2013 at 10:17 AM. |
#2
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[COLOR=Black]Liberty GT Spec B tuned 240 HP & 372 Nm at the hubs.[/COLOR] "Instead of banning high performance cars - ban low performance drivers" |
#3
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Maybe I didn't read it properly, but I couldn't find what I want there.
I assume oil viscosity and temp are exponentially related? So even 10C lower could double the viscosity?
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MY08 STI 422whp at 1.5bar on E85, built by Diversion Garage, assembled and tuned by EvoR Update from new owner: 375whp at 1.4bar on 98, at Tokyo Motorsport Last edited by s20525xxx; 16-02-2013 at 09:48 AM. |
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Thank you GTB, just notice in the article, he mentioned "use whatever it takes to get 75 PSI at 6,000 RPM". So I think I should keep using 10W40...
__________________
MY08 STI 422whp at 1.5bar on E85, built by Diversion Garage, assembled and tuned by EvoR Update from new owner: 375whp at 1.4bar on 98, at Tokyo Motorsport |
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engine, oil, pressure, temp |
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