Castrol High Mileage Dexron III/mercon ATF: Great?

[swedesteed]

Needing to do an ATF + filter change on our 90's Buick and came across Castrol Dexron III/Mercon for Higher Mileage Vehicles, at Autozone.

Is it really that much better and worth the extra couple bux per qt.than say, the conventional Castrol DexIII/Mercon or the Valvoline MaxLife ATF?

Havent been able to find ant feedback / info on this particular ATF here on BITOG...

 

[229]

DexIII is no longer licensed by GM so you could get anything without regulation. Use DexVI it is backwards compatible.

 

[Robenstein]

Valvoline Maxlife is a group III synthetic....Id go Valvoline over Castrol on many many products.

BTW....its what I am running in my G body Monte Carlos without any problems.