Fair enough
I can understand letting it tick over for a bit with a rev now and again if it's not been used, but the best way to warm a modern engine up is to drive it. Not spend 20 minutes reving it every 5 seconds.

A mate of mine I used to work with had a bike and used to let it run for a couple of minutes before driving it. Partly to let it warm up, partly to annoy the bitch in the office next to where he parked.
(hagis_uk, Sat 3 May 2008, 14:27, Reply)