That ‘inventory optimiser’ fluid claims to be suitable for the ZF 6HP26 (Shell M1375.4/Ford Mercon SP), the GM 5L40-E (BMW ETL-7045E, ETL-8072B) and the ZF 5HP24 (BMW LT71141).

Having seen the (disastrous) consequences of filling a 5HP24 with Dexron on a number of occasions, the correct fluids clearly use different friction modifier packs.

I’m 100% with JCL on this one.

Phil