Well I put the Mobil Super Syn I picked up with Oriellys had it on sale for 3.49/qt. I will say i dont know what is in it that the VOA didn't pick up but this has really quieted down my valve train. Even more so that the MS HM I had in it before. Runs smooth as silk so far but we will see after 6k when I do a UOA. For the price its a great product imho.