I try to take mine out at least once every two weeks in the winter although its a carefully calculated balancing act for reasonable conditions. Less concerned if the car already needs a wash but very wary of salt on the roads even if they are dry. In my M3W I could taste it on my lips and once its on the car it mixes with general dampness in the garage to create surface rust anywhere the paint protection has weakened, and suprisingly quickly. Almost as bad as if car had been put away wet!
A good wash underneath followed by drying run on local non-salted roads seems to work the best.
Mechanical sympathy would never have me start the car and run engine stationary. The only way to warm an engine up quickly is to drive it, warming the cold oil as quickly as possible. Even after a longish run I put the car on a smart charger once in a while and am always surprised how much more energy the battery will take.
Last edited by Richard Wood; 07/12/20 08:21 AM.
