Just because a 'BMW Master Mechanic' says it does not make it true....

Until someone has actual wear data, I'm going to say that the 'wear reduction due to the decrease in warm up time' versus the 'increase in wear due to revving the motor to 2k, 3k rpm when cold', cannot be answered...and can be spun however you want to support what is in the owners manual.

Anyone have any DATA?