I have a small leak in the rear main/ oil pan, haven't really gotten around to finding out which one it is. The head gasket is not leaking, and i'm good about wiping any excess oil up when changing the oil filter. When i have the heat/vent/air on with the fresh air button on instead of the re-circulate button on, i can smell burning oil. ??? Do you think it is coming from the oil pan/rear main leak? That just seems too far back and down for me to be smelling burning oil. And when i check the oil between oil changes it is not using hardly any.