Its either fuel or coolant. If the oil is a coffee with cream light brown (not the carbon black) its coolant. Fuel will not change the color of oil much.

What your dipstick with coolant in the oil will look like


If you have leaked enough fuel into the pan to rais the level it will smell like gas.. no doubt about it.

So check your coolant level also.

Last edited by pfarber; 03/08/2014 11:47 AM.