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Two anecdotes from when I visited a German tank squadron were:

"And here folks is our three liter tank. We like to call it like that because it needs three liters — just to start up."

Why? Because it has a 90hp motor. That just exists to crank the _actual_ main motor at 1000hp+

That day I learned that tanks are veeeeery thirsty beasts.

>it needs three liters — just to start up

Finally, a worthy opponent for the average American car :)

> Because it has a 90hp motor. That just exists to crank the _actual_ main motor at 1000hp+

Also known as a "Pony" motor. Other heavy equipment such as large Caterpillar D series bulldozers often have these just to start the prime mover.

Also a lot of these machines probably have hellish MPG, as low as 4-10 MPG, even the trucks.

The space shuttle's crawler transporter managed 42 feet per gallon or 126 gallons per mile, which is 0.008 MPG :)

Ouch! I did not know that.