Would $60 for fuel, including service charges, be approximately the amount of gas needed to drive the car 160 miles? If so, this would seem to be a case of some insider taking the car out for a nice long ride after you returned it. If I estimate 20 mpg (OP said it was an expensive rental, so maybe a sports car, high performance car, or large luxury sedan?SUV), that would be 8 gallons at $5 per gallon plus a $20 service charge. The numbers could make sense.