Two years ago coming back to California from Utah, we filled up just west of Salt Lake City. I figured that even with afternoon head winds, I'd have more than enough to reach Fernley, NV. It was relatively cool and only had to run the generator for a couple of hours in the late afternoon.
Well, the next morning the winds weren't as calm as had been forecasted. About 100 miles from Fernley the low fuel light came on, and I started to worry some. Though I have always guessed I have about 150 miles until I run completely after the light comes on. As the winds continued, the needle kept going lower and lower on the gauge and the miles to go didn't seem to be passing as quickly as I hoped. Needless to say I was getting more and more concerned.
We finally reached Fernley, thank goodness, and as I was filling the tank, I was curious to see just how close I had come to running out. I had always thought the coach had a 75 gallon tank, but the pump cruised right past 75 and ending up at about 77.5 gallons, I realized how thankful I was that it was actually an 80 gallon tank! Otherwise I (and my family) would have been stranded on the side of I-80 about 20 miles back! I swear that I did not intend to go that low and have never gone much below a 1/4 of a tank, and definitely not if didn't know exactly where the next has station is.
On a side note, I have had it down below 1/4 if a tank when we were less than 50 miles from home, and know where all the local stations are and only want to get the CHEAP gas at our local Costco. Interestingly, the generator has continued to run until that point. I have not had it run so low as to find out when it will shut off. I guess the day they built my MH, the person felt generous with the pick up hose and gave me a little extra. Not sure if that's a good or a bad thing...