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Originally Posted by Rupes
^ Andrew, thanks for sharing. If this is true (optimal temp is in the middle), why does it say "OK" way before reaching the middle?
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You'd presume BMW think it's OK to start using an extended rev range but it's not clear. Safest way is to stick to the centre position as that is fully warmed up. It also mentions in the book that if you have a DCT car and want to use launch control, to drive for about 6 miles. In my experience this is a similar distance (unless stood in traffic) that it takes to warm up fully ( so they're referring to it warming up fully again).