The reason i noticed it was becouse it ran without a pcv system from the beginning! Hose to the aircleaner from one of the valve covers, and an unvented cap on the other! This lead to a thick white coat on the inside of both covers! With the pcv valve installed, its only on the pcv side, with a thin coat of white on the inside, mainly around the pcv valve! But becouse of the oil return being almost straight under im conserned about the condens that dripps down there and with time will mix with the oil!? Or mayby that wont be a problem? When its been run for 18 miles/ and have started cooling down. When i pull the covers i see this quite thin layer of condense/ white on the inside of the cover(mainly around the pcv valve hold), and a small amount of white/brown oil laying under the return hole! absolutely nothing on the other valve cover/head! And as i said, like new oil on the dipstick, with no condense on the stick (had condense there without the pcv installed)