Originally Posted by TiAgX5

I could never understand BMW owners who insist the BMW logo MUST be on the fluid container if it goes in their BMW.

BMW and their suppliers provides the specs for fluids, and REPUITABLE fluid manufacturers can verify their fluid meets those specs.

I run Mobil 1 0w-40 LL-01 spec fluid, still on OE guides and near zero oil consumption with almost 200k miles.

I did 3 trans drains/fills at 100k miles with Castrol LT-71141 acceptable spec fluid (Castrol Multi Import Car), all the "ZF fluid ONLY" owners chimed in stating the trans would fail. In the 100k miles following fluid change the X has seen extensive tow duty (6k lb trailer on runs between FL & TX, 7500 lb trailer with 5 occupants and luggage in the mountains of northern PA), even track lapping with 5 on board in Sebring last month.