Quote:
Originally Posted by RobertISaar
the extra heat came from somewhere.... either from more friction within the engine itself or the oil is absorbing more of the heat created by combustion....
if one were to have a consistent history of used oil analyses(sp?), then you could determine which pretty easily. if not, kind of guessing.
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IMHO, this is discussion is too much based in theory and too little in practical knowledge.
As an engine gets older and after it has had more wear on it, it might benefit from using a heavier weight oil. Where (in what climate) does the OP live? That has a bearing on choosing a multi-viscosity oil that would be best for the climate involved. There is no "one size fits all" best solution.
When it comes to oil choice and oil viscosity, living in Alaska is different than living in Florida...
The age of the engine matters. And its operating enviornment matters.
OP: ultimately, there may be another problem that is affecting your FE in coincidence with your recent oil change.