..., while the Abrams guzzles more fuel. Also, not diesel, but (preferably) jet fuel.
This again... Yes, the Abrams needs more fuel, than for example the Leopard 2. But it's actually not that much more. I'll dig up the numbers later, when I'm home. Also the claim about jetfuel: The Abrams uses (mainly) JP8. And so do most if not all vehicles of the US military. This was done to unburden logistics - You only need to ship JP8 if everything in your arsenal uses it. And JP8 is basically Dieselfuel with worse lubrication properties than regular Diesel.
Hey, that is still considered "high-speed" here in Germany!