Engine Efficiency
The reason for so much fuel capacity? M1 Abrams get around .6mpg – putting its range at roughly 300 miles. When traveling cross-country, the engine alone burns over 1.67 US gallons per mile. If the engine is idle, it consumes about 10 US gallons per hour. Wow! That is a lot of fuel consumption. If you drive one of these things, you better keep it in motion. We wonder if tanks have cruise control.