Double de-clutching or not?

Friend who claims to be VERY engineering qualified claims that driving a modern manual car and double-de-cluching saves wear and tear of syncromesh and clutch plate. Seems to me by activating clutch pedal twice without need accelerates wear and it is 2013 not 1913!

Who's right?

Asked on 17 February 2013 by BBBB

Answered by Honest John
I find I drive more smoothly by double declutching because it has become instinctive.
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