i have a gtr33 vspec and have install a set of tomei cams , they are 260 9.15 in and ex with cams gears set a 2 deg adv in and 4 deg ret ex before original cams was taking out i have check my valve clearances and my intake valve clearance was .457 and .483 max & my exhaust was .457 .after install my tomei cam i get the same reading that was when i started to hear tappet noise,
can it be cause by using castral 20w - 50 oil , .