Normally I leave my car in idle mode every 15/30 days, in the following form: ten-twenty minutes until the temperature reaches 60 to 80 degrees and first slowly 900 rpm until then until the 2000 stepwise and slowly down again. The car stands outside but with a car cover and rides it rarely in winter. Is this procedure “empty run” suitable or just bad ?? For your experience and advice you would be danbar, greet from Spain/Spa nienland p.s. VOLVO 240 / 1980