I have brand new car, at about 700 miles I checked the oil level and noticed it smelled a bit like gasoline. I had always heard that is not good? I wanted to do an early change anyway to get the factory mystery oil out of there and get some Castrol GTX in (MmMMm Moly). Well not 200 miles into the new batch it has a gasoline smell again. Is this to be expected in general? Or to be expected on a new engine during the break-in?