Prius and Synthetic Oil?

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Originally Posted By: Malibuman
I would use a synthetic because of the engine starting and stopping all the time.


Again, syn or dino, I think that either a oW or 5W for pumpablity and flow should work.
 
Originally Posted By: ARCOgraphite
IR tools (~Omegascope)will show different reading depending on the "emissivity" of the surface. They exhibit a not insubstantial temp reading difference from a polished steels to a anodised hardcoat Al or a flat witch-black mild St. The tool has to be calibrated to the surface finish. Alternatively, I would make a J or K type micro pill thermocouple and run it down the dip tube into the sump - or for "easy button" epoxy foil TC to the pan and run wire to the vehicle interior and install a fluke or becker via velcro(tm).


Exactly right! The dip stick is sort of shiny and has a bead of oil on it. I shoot for the oil drop. Close enough for gummint work....
 
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