No fuel in the oil that I can smell.in that case level may stay or rise, due to fuel dilution. diesels are most prone.
does the oil pass sniff test?
even if the engine does not consume a drop, oils are commonly at ~10% noack.
that´s probably why i see miniscule decrease on dipstick of a thick 3,9 hths 5w40 (long ~1h trips, no gasoline smell)
I'm sure the engine is not perfect and uses some oil (in an amount that is negligible). All the vehicles I have now get their oil checked monthly just as a precaution.
Those two Chryslers I owned needed top-up every 2-3 weeks. It was significant. I even waited until the oil hit the low mark on the dipstick to see if oil level had any impact on the consumption rate. Nope. They drank it at a constant rate. At oil change time, I would buy 1 filter and 2 jugs of oil. One jug to pour in and the other to top off with. When the second jug was empty and the engine needed topping off, the van would have about 5000 miles on it.