Dont feel too bad Mr.T. I did something similar a few weeks ago. I borrowed my friends VW Jetta Diesel while my sentra was in the shop, and the caprice is still in winter storage.
Anyways, to make a long story short, I think it is only right to fill up the tank after you borrow someones car. Unfortionatly, I filled it up with petrol, and not diesel. Man, I felt like an idiot.
