I may have sounded casual but with 8 hours endurance. a large useful load, fuel totaliser and range rings I am spoiled .
After years flying more basic aircraft knowing your machine (and your dipstick
) is important.
Dipsticks are of limited value on most Cessnas due to the shallow tanks. Totalling the fuel used after every flight and knowing your fuel burn are the best ways to calculate endurance.
D.O.