Just pulled my 6 speed ZF out and have to comment on the sticker telling what oil to never replace in it!lol.
“Lifetime fluids” was a marketing ploy, but a maintenance philosophy.
Not sure if BMW just expected their owners to blow up their gearbox before the dirty fluid could be blamed My ZF 5-speed in my E36 M3 said "lifetime" as well. I changed it years ago at 110,000 miles and was glad I did. It was super dirty and was tough to shift in cold weather even after warm up - after changing it that issue went away.
#44 BMW E36 M3
NASA ST4 Racer
#hispeedmotorsports
everything and nothing is lifetime fluid. the lifetimes ends when the fluid stops working.
The lifetime ends when the gearbox blows up!
It's for the "lifetime" of the warranty period
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