Warning: When attempting this position, make sure the car has not been driven recently and is completely cool.

Take an unrolled condom, slip the end inside the exhaust pipe and stretch the opening over the end of the pipe, or use a plastic bag secured around the opening with a rubber band. Squirt in some lube, insert your penis, and fuck your car.

Alternately you can insert a cyberskin masturbation sleeve or small pocket pussy into the tailpipe, add lube, and screw. Make sure the end of the toy a little larger than the end of the tailpipe or you may have trouble retrieving it.