Cars, Harleys, and big fucking trucks, high horse power, and grease are all big turn ons for me. I am not the only one, and here is a guide on several positions in and out of the car or Bike that you and your Hot mechanic can do. (I know that about 3/4th of them I have done )

http://www.car-sex-positions.com/index.html

....I am going to go smear some motor oil on myself now!