Posted by ss55 on January 08, 2015 at 20:35:29 from (173.28.18.88):
In Reply to: OT: truck oil pressure posted by LOU from Wi. on January 08, 2015 at 19:36:52:
Have your outside air temperatures dropped a lot recently? Start up oil pressure can vary a lot with air temperature. A 30+ degree temperature drop could cause your heavy 30 weight motor oil to thicken enough to double your start up oil pressure or even push open the bypass pressure valve. I wouldn't be too concerned about start up oil pressure, but would still monitor the oil pressure after the engine reaches full operating temperature. 5W-30 motor oil would make starting easier in below zero F temperatures.
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