This is more of an informational question than it is a real concern. Since I have owned my CX, I have always noted that the oil smells pretty strongly of gas. I am not overly concerned because comparing the drip rate off of the dipstick with the crankcase oil versus new oil out of the jug reveals that there has been no change in viscosity, and I have not had any problems with the bike on long runs. I did wonder after rebuilding the carbs and changing the oil & filter if the odor might diminish but that has not happened. Just curious - have any of you noticed this?