This
Clutch wear is mostly from the initial take off. If you shift properly, you won't put ANY wear on it from one gear to another while moving.
Are you doing it right? I once had an employee who drove a F-450. It was purchased used, so when the clutch failed in six months, I didn't really think much of it. When did months later the new clutch was failing, I called him in and made him drive me around the block.
He slipped the clutch badly to get moving, racing the engine and slipping it until the truck caught up to the engine. Then, on the next shift, already moving, he raced the engine again and slipped the clutch until the truck caught up to the engine. When he did it a third time, I told him just pull over.
I asked him who taught him how to drive? He said nobody. Mind you, he was mid 40's, with a CDL, and in all his life no one had ever told him that was the wrong way to do it.
I made him ride while I drove, and explained how to work the clutch, just enough throttle to not stall out, and minimal slip, then at gear change, match speed and no slip at all.
Then I let him drive again, while coaching him how to do it, and it was like night and day. In the next few years he drove that truck for me he had no more clutch problems.
