Ever since I put Millers 10w50 nano oil in my 996, it smokes a bit on initial start up. Both pipes blow out the same amount, it is blue smoke and smells oily. It puffs around 10 secs after start up for about 5 secs, then no more. It doesn't always do it, but especially if left for a couple of weeks. Any one else have this with Millers?. With mobil 1 it smoked occasionally, more often during winter months.