Originally Posted By: btanchors
Does fuel that makes its way into the oil "evaporate"? I would think gas in oil would tend to evaporate if the oil reaches operating temperature and stays there for awhile.
Gasoline is not homogenous but rather has a large number of components, both heavy and light, each of which has their own evaporation point, some of which are quite high. At typical oil operating temperatures, only about half of gasoline that enters the oil will evaporate. So, once gasoline enters the sump, some of it will remain under any circumstance.