Mike Miller said in a previous version of his Maintenance Guide that he uses MTL in BMW manual transmissions exclusively, unless he can't trust the driver to shift properly when the gearbox is cold -- in those cases he'll use an ATF.
Quote:
Originally Posted by einserM
I'll just add this here from Redline's manual trans lubes PDF found here http://www.redlineoil.com/content/fi...%2010-13-1.pdf
Seems they're saying MTL provides better wear protection than their ATF oils. Given the power/torque of the 1M vs a 135i/335i it could be a better choice. A super thin ATF just doesn't sit well with me in a manual trans. There's more to oil choice than "smooth cold shifting" which seems to be almost exclusively what BMW owners focus on rather than taking into account mechanical/physical properties of an oil/gearbox that may explain this. |