So, I've done a lot of research and I'm still torn. I know that Valvoline alleges that their Maxlife multi vehicle ATF is "suitable" in applications calling for Dexron VI. But as best as I can tell, this fluid meets Dexron VI viscosity and is in the ballpark on the add pack. Plus, it's fully synthetic. The biggest argument against using this is that they already make a synthetic Dexron VI specific fluid. Here's my issue. My 2007 Buick Lacrosse has a bona-fide 278,800 on the original drivetrain. The PO was a traveling representative for the local unions in the tri-state area. Anyway, I'm torn between using a good brand of factory spec ATF versus Maxlife because I don't know of another high mileage Dexron VI transmission fluid. And I think we can all agree this is a high mileage example. I've already bought some Valvoline Dexron VI but am debating Maxlife for future drains. I know OE spec is usually best but I want this high mileage transmission to go the distance and I'm not sure if regular Dexron VI can offer the necessary protection. I welcome your collective experience and insights.