Jim-- Dunno...This guy is truly reputable... and he really doesn't like messing with the chemistry !
And one of the very worst aftermarket additives I have ever tested is “ZDDPlus” zinc additive, which claims to greatly improve a motor oil’s wear protection capability. But, when put to the test, it actually destroyed the wear protection capability in “every one” of the several different motor oils I tested it in, making the oils far WORSE than they were to begin with. You can see the numbers in my Wear Protection Ranking List for yourself. My Scientific Engineering Torture Test on motor oil proved over and over again, how BAD that product really is. So, you CANNOT believe any aftermarket motor oil additive advertising either. Buyer Beware!!
His insights and test and conclusions on filters is also striking... I'm rethinking my whole lube strategy! ( Wow BarnBird...GREAT Article)
'68 400HO Coupe, 4 spd, 259 interior, Windward Blue. My other car's a Johnson 15 outboard on a '61 Starcraft rowboat... Just sayin'.
