A guy in a powerboat ran out of fuel and had to be towed to Friday Harbor. He had gone to Bellingham (the mainland) to buy fuel in order to save $0.75 a gallon. By the time he got there, the fuel dock was closed. On his way back home (a 10-hour round trip), he ran out of fuel and had to be towed in the dark of night with gale force winds forecast.

According to the math in one of the comments, he probably burned more dollars of fuel to make the 60 mile round trip than he would have saved so no one can figure out what he was thinking. I suspect saving money on gas was a lame excuse for some other reason to visit the mainland. ("Honey, I’m going out to top off the tank… ")