In article .net,
Michelle P wrote:

I started with eighty gallons of fuel. I was flying at six or eight
thousand feet. Between 75% and 65% power. This puts fuel consumption is
about 11.5 GPH. This gives me seven (6.95) hours endurance. I went six.
With still nearly an hour of fuel left.

But you didn't mention how many piddle packs you went through?