I apparently have oil getting past my new teflon valve seals, but I wont have the time to replace them for a month or two. I'm considering running valvoline maxlife to reduce the oil burning over that time. So, do you think running maxlife will swell teflon seals? Also, would there be any problems running maxlife in a rebuilt (<10 mi) engine? I read here that once you run maxlife, you need to replace the seals if you go to a non-high mileage oil, but I really don't buy it.