For those of you who are new. One thing that you can look at is your fuel rate per hour! Divide that number by seating capacity, and that will give you an index on how fuel efficient your plane is. An ATR is between 8-12, at a capacity of 64 seats. Compared to a 128 seat 737-300, which has a fuel rating around 18. The more efficient your fleet is, the more profitable you will be!