The last time (actually the only time) that I have ever been challenged about how much fuel was used whilst the car was in my care, resulted in me asking the customer to pay the bill & exercise her right to find another repairer!

She was not happy that her car was covered in dust & that I had apparently used 3/4 tank of fuel.

It was booked in for an emission related problem & she was on holiday for the week.

The car spent an hour in the workshop & was held at fast idle for approximately 20 minutes.

Should we document mileage & fuel content on all cars as they arrive?

Ahh the joy of dealing with customers!