sail2wind - we usually tank up in the second half of a 10-day run, but we're running the generator 14 hours a day and often motoring too. So often we'll take on 40+ gallons. I feel more comfortable not pushing it to the hairy edge of a 60-ish gallon tank. I'd rather return to base with 40 gallons in the tank vs. run out of diesel in the channel on the way in.