My first car was a big black mid-80s Dodge truck. I was Keven for a long time. But back when I was Keven, the standard fee was a six pack of beer and enough money to cover gas. I usually wouldn't bother about the gas money unless it involved driving some significant distance though. The price only went up to include pizza if it was going to be a multi-hour or all day kind of affair, like helping someone move house. BBQ or fried chicken was also acceptable.