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      08-12-2018, 12:43 PM   #1
Vetracr
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Dash oil temperature gauge incorrect!!

See prior post for oil and water temp gauge and oil pressure gauge installation. Now that I had tools to measure REAL oil temp I ran a track day. At 7000 rpm in 4th gear on a 90 degree day I was reading 165 degrees C (329 degrees F) on dash oil temp gauge. Oil temperature gauge measuring oil exiting oil cooler was 210 degrees F!!!!! Water temperature under the same conditions was 235 degrees F. Clearly dash gauge is wrong or is computer manipulated temperature. The BMW oil temperature gauge is in the pan. The oil pump draws oil from the pan and then compresses it to 70 psi adding more heat to the oil. No oil cooler, no matter how efficient is going to cool oil from 329+ degrees F to 210 degrees F. From driving on the street it is also clear that the dash oil temp gauge is dampened to have a very slow response. Bottom line is that you can't rely on dash oil temperature gauge for an accurate reading.
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