Hello! Does anyone have experience with the stuff? I’ve read that Wynns is supposedly better, because it doesn’t have a VI-improver and serves purely to “care” the seals (should somehow easily swell up and thus become better dense again)… Do you use these additives once, rather 2000, before the next oil change or permanently (so basically in the fresh oil after an oil change? My 850 takes oil (currently 10W-40 SHPD from HighPerformer), but it doesn’t seem to burn, because it Don’t blow out the back, neither at the start, nor under load, nor at a hearty gas surge after idle…he’s rather dripping into the garage and that’s not optimal, because you don’t want to pollute the environment… Maybe I’m going to reoil on 5W-40 from PRAKTIKER or 5W-40 from MEGUIN (Super Leichtlauf or High Condition) or 5W-40 TOTAL Quartz 9000 (Energy)… Please don’t fight a ditch; I’d prefer experiences…