So, Mr.kunkel, does type fa have better lubricating ability over regular type f? i am trying to figure out what the difference is between type f and type fa, and i would assume the A in type fa means additives, and by extra additives i would assume that means it has better lubricating and protecting ability. You said dexron/mercon would be more appropriate because it has better lubricating properties so i was just wondering if the type fa would have better lubricating abilitys then the reg type f. If i do end up running dexron/merconIII what do you think of the valvoline max life dex/merc fluid? it is a full synthetic and my builder advised against synthetics, and according to the valvoline fluid tech i talked to on the phone the valvoline max life is a full synthetic universal fluid and would be fine for my transmission, that being said would i get firmer shifts with the valvoline max life or with the reg valvoline dexron/mercon fluid?