>Abrams tanks run on a "gas turbine engine which needs jet fuel," Kirby said. "So there's a specific type of fuel that powers the Abrams, and we've got to make sure that pipeline—literally and figuratively—is available to Ukraine."

https://www.newsweek.com/us-abrams-tanks-fueling-problems-ukraine-1776639

The article goes on to mention that it can run on other types of fuel, but no one has done so to their knowledge. There is no "idle", the turbine runs continuously after ignition so, if/when they do use another fuel, the same problem arises only with a different fuel. The Abrahms is a HUGE fuel hog. That's the problem.