Same here - if they offer, I graciously accept it. Some don't know any better and I don't hold it against them and they are usually the neighbors who only come with us once or twice a year. I think some people equate it to riding with you to a ballgame or something so they don't think to offer you gas money. Now if it's someone who comes often and takes 3 or 4 turns every time and they don't chip in after several outings, then I find an opportunity to let them know in a nice way that chipping in for gas is appreciated. I think some people are afraid they may offend you if they offer gas money and some people, it just never occurs to them. Again, I don't hold it against them.

When I am invited along on someone else's boat, I always insist on chipping in and I usually make it a point to do it in front of everybody so that they are reminded to chip in or are clued in to the fact that they ought to. We boat owners have to look out for each other