Carrera Digital D-132 (Pro X)
I'm running D132 cars with FUEL = ON setting on the CU.
I have noticed that the car on controller #1 progressively slows down when it runs out of fuel. Other cars do not.
So I did a test...
If I take the car on controller #2 (say) and re-assign it to #1, it too will slow down when out of fuel...