Just tossing it out there; I'M FAT!!

I've worked with engineers in the mountains around here who thought like that; took the company SUV up to job sites, then turned around and went home only to ride their brakes until they faded to nothing! They radio me for help, by the time I get there the brakes and fluid are cool enough to proceed. I then tell them to use engine braking coming down the grades by dropping into 1st or 2nd, not in DRIVE. The light bulb comes on and they understand completely why, just never considered it.

My truck as the Cummins Jake brake installed. That works great! Saves my brakes and since it's factory, it works with my manual shifting/clutch operation.