I know why they do it, overfill my car with petrol that is, I just wish they wouldn’t. I would give them a tip anyway for the luxury of not having to get out my car and fill my own car up, especially in the summer months. They just like to click it a few more times so that the price is an odd no in the hope to claim a few extra dirhams. Maybe there are some really tight people out there who don’t tip?? I’ll put a sign on my car, willing to tip if you don’t make it drip!!!