I really do believe in what goes around comes around. On a trip from SF north to Mendacino, CA we had absolutely no wind and motored both ways. The boat was new to us and the accuracy of the fuel gage unknown. By VHF I put out a call for diesel and got an offer from a professional crew in route. We meet in the open sea and with some difficulty they passed a 5 gal jerry can, said keep the jug and would accept no payment. The very next day after re-fueling in Bodega we spotted and boat just outside the Golden Gate, becalmed and with only jib laying limp. Their story was after 6 days at sea, blown main, blown engine etc. We towed them to Redwood City (6 hrs) and when they begged to pay us we just said it had already been taken care of!