Anyone notice that the GC seems to cling quite well to the dipstick? I have no idea if this is good, bad, or whatever, just something I seem to have noticed! Might this characteristic support the notion that there's a lot of esters in it? Also, why is Mobil so keen on ridding M1 SuperSyn of esters? In other words, what are the disadvantages of esters? I read something about moisture retention, are there others besides price?