Tracked my car a few days ago, didn't miss a beat, didn't burn any oil (F20c). Oil used was Penrite 10w40 Racing. I notice now (of course, checking the oil when COLD), that the oil doesn't cling to the dipstick, i.e it seems like it runs or drips off the dipstick. The oil as it stands has less than 1000km on it. Has the oil lost its protective properties?