I'm not sure how that causes more clutch wear than up shifting or whatever shifting you do in normal driving? The only time the clutch is getting worn is the split seconds that it is slipping as you engage it in the new gear. Whether you're up shifting or down shifting, you're wearing out the clutch in the same manner.
The only time I do anything that could significantly affect clutch life is when I hold the car on an incline using only the clutch. |