What should my fuel consumption (PPH) be when cruising at say 18000. I get 17000PPH, the higher I go the more it uses.
I cannot possibly cruise at FL300 as I would not make 4 hours in the air.
Another thing - my 4 gauges show 3000pph each which should = 12000PPH but I always appear to use about 3000 - 4000PPH more, Why is this?

Thank you in advance for your response
Kevin