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There's nothing at all wrong with a suggestion, this is a forum. All advocates provide opinion, all those with an opposing view provide opinion. Most so called science in favour of these additives is paid for by the people who profit from selling the 'snake oil', and most so called reviews are paid for infomercials or forum shills paid for by the people who profit from selling the 'snake oil'. Only the engine manufacturer knows what's safe and should be used ... and says so. At the end of the day people have choices, I'd hate the idea that anyone compromises the reliability of their engine going off half-cocked especially when they do it believing they are giving it extra protection when they are doing the opposite. To make a change to the expected 'mapping' of a 'smart trannie would be to invite disaster, that's not an exaggeration, just a fact. The 41TE is a smart trannie, its actually run by a computer equipped with on-board diagnostics right there in your unit that changes and makes learning decisions by the minute, any reading, any malfunction will throw up a code or it will try and compensate for example in this case in a dramatic change in the existing ATF+4 viscosity. Best of luck.