Yea they are talking more about viscosity rather than the additives for LSD oils as friction modifiers are used in full syntectic oils. LSD additives objectives are to increase friction like when you make that corn starch slime and punch it, it doesn't stick to your hand. Thats sort of how LSD oil works than you have full syn non LSD oil with friction modifiers to get it to run like water but hold a GL5 grade. This is like the diff oil I used in my brothers falcon 75w-85 GL5 $110 for a 1l bottle and it's go better shear strength than a 80w-90 mineral oil. This is what I think Eaton is reffering to, not lim slip additives