I tried the GC gold on my 91 pathfinder and the motor wasn't as quite as when I had 10w 30 chevron supreme in it w/ 1oz/qt of vsot..so I added half a bottle of vsot to the GC gold and everything is nice and quite..I'm about 1500 away from getting a UOA, should I be worried about compatibility with gc and vsot like additive clash??