What causes blue smoke to come from your tailpipe?
the engine is burning oil. blue smoke oil white smoke antifreeze black smoke excess fuel
There could be many problems related to smelling gas and seeing white smoke from your tailpipe. Some suggestions would be the head gasket. If the smoke has a blue tint to it, it may be oil related. If your car has a turbo, it may be the turbo needing to be replaced. To be sure, you can have a mechanic do a diagnostic on it.