Hey Guys,
Im currently using mobil 1 5w-50w fully synthetic. The previous owner used Shell oils, and i noticed there were some lifter noises coming from the engine, however after putting mobile 1 into the engine it quitened down a bit. I was told that it will take a few oil changes with mobil 1 fully syn for it to show a huge improvement...
Ive been reading through these pages on oils and it seems that as long as you use fully syn and change the oils frequently the actual "Brand" name per say, is not really a huge factor.