So dual rated Transmission fluid in general is not a good idea from what I see in the posts? What about the standard Dexron III, Mercon dual rated fluid? That is about the only thing you really see at stores around here. If I wanted straight Mercon only I would end up probably having to get it at a Ford Dealership.

Also... what do you guys think about Lucas additives for the Transmission that "control heat" and "prevent wear" and things like that? Is there any truth to a transmission additive like that? Or would my E4OD be picky about that kind of stuff in the fluid as well?