you can feed them pretty much anything so long as it’s a liquid containing hydrocarbons. Cooking oil, aviation gas, diesel, petrol, methanol, alcohol, you name it. This is great for the Logistics chaps as they don’t have to worry about providing different fuels for different vehicles and, in extreme situations the tank maybe able to procure something locally if fuel is limited. The downside for the Logistics chaps is that the Abrams drinks fuel like it’s in the only open bar on judgement day. Literally, running a regiment of Abrams as an MBT would bankrupt a number of small nations in fuel costs alone. Each tank uses about 500 gallons of fuel for every 350 miles, assuming its on flat pavement at cruising speed. Tanks do not normally inhabit flat, paved, areas, as theses areas are generally considered to be bad for their life expectancy so those figures are an almost unachievable target in real world use.