Using 6 miles per gallon as your fuel mileage and 8 pounds per gallon for the weight of fuel, how much total fuel weight will you burn off in 600 miles?

To figure out how many gallons of fuel you'll burn off, simply divide the number of miles travelled by the miles per gallon.
Number of miles traveled / miles per gallon = gallons of fuel burned off.
Fuel weight = 600 miles / 6 miles per gallon × 8 pounds per gallon.
Fuel weight = 800 pounds.