Found the best oil for my ls1

[94CLUBBY]

found the best oil to use in my LS1 and its valvoline synpower 5w/40 with a 100mls of pro-ma mbl8,my engine now is whisper quite no lifter noise on warm what so ever,its running mint,i had that manky penrite in there before and i must say that oil is utter crap,i should of know from my last SBC that they don't like running on that penrite water!!anyway try the valoline with the pro-ma and you'll LS1 will be the quitest its ever been its just seems so smooth and responsive.