Does the common suggestion to drive for longer to “get rid” of fuel in oil have any merit?
I don’t think we’d see so many diluted samples if it did. Operating temp of oil averages 200-250F and the flash point of fuel is basically double that. I think once it is in there it is pretty much gonna stay unless you change the oil.
Flash point and vaporization temp are not the same thing. Gasoline or rather certain components of gasoline start to boil around 100C. Which coincidentally or not is the temp around which most engines keep the oil temp.