In article , G.R. Patterson III wrote:
What engine do you have in there? I burn 8.6 gph with my 160 hp O-320 and
flight
plan for 9. My redline is 2700 rpm, IIRC.

That seems a bit high too. I used to reliably get 6.6gph at 6500' out of
our club's C172N at 105 KTAS.

--
Dylan Smith, Castletown, Isle of Man
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"Maintain thine airspeed, lest the ground come up and smite thee"