Quote:
Originally Posted by kiysersosae
I'm not sure what they are on now but I'm sticking with whatever is in, even if it's no frills supermarket oil it's getting left alone.
I do have info that says the lt5 was specifically made, or upgraded from another lt, for the 1m due to the car having a new type of carbon friction linings on the synchros
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That is my info too. LT2 replaced LT1 which my 2003 ZHP uses now. Again, BMW put LT5 for a reason and people were putting other stuff in the gearboxes that they couldn't have been tested or engineered for the 1M gearbox at the time. I'm sure now they might have something but people were putting Redline and other fluids in their gearboxes that predated whatever new coating BMW put in the gearboxes. I would stay with LT5 or another oil that says it is compatible or meets the same requirements as LT5.