Won't do anything for the brakes but switching to DEXTER "NEVER LUBE" bearing sets will eliminate a lot of the dirty work in what you are doing-just a thought.
Everything is affected by thinner air-even diesels,turbo's or superchargers help make up a lot of the loss,but not all.Chips,exhaust,etc.,etc.,gas or diesel help,but so many people forget that they still have to stop and turn that rig and that maybe ...