Research - Excavator Fuel Saver

Excavators constantly use fuel when assigned to a dig area. This is most obvious when mines are full on exports or trucks are not available to fill. The excavator will sit with a full bucket and consume fuel.
Research would add the ability for "operators to shut off their excavators while not in use" and no consume fuel if not actively swinging the bucket or moving across terrain.
While I understand the thought process for "excavator in use, let it drain fuel", the features ends up more like a phantom drain on diesel in my playthroughs.

It should also be noted that if you pause the mining tower all assigned vehicles will return to the tower and even when sitting doing nothing at the paused mine control tower they will still consume fuel. This should just change all together to zero fuel use and a massively reduced maintenance cost. A vehicle not doing anything is off, but will still need maintenance just reduced.