If the maintenance time is less, fewer engine hours/days will be added (Real example: Like a small oil change). Once maintenance is complete, engine hours and days will be added to the vehicle, which increase the time until the vehicle has to be serviced again, depending on what you have configured on the pallet. If you drive close enough to it, the occupied key appears in the help window and maintenance can be carried out. To service the vehicle (by default: Ctrl + m), a pallet must be bought in the shop. If maintenance has not been carried out by then, the engine may misfire and cut out if the engine load is too high.
In the help window you can see when the limit of the vehicle is pretty much exhausted. This mod simulates the maintenance of drivable machines much more realistically.
