The Tomos maintenance manual says that using
10W30 will increase shift speed. IT DIDN'T!!!
but gear oil? holly shit!!!
>i drained the SAE 30 motor oil out of my tranny, and put in >some heavy duty 85w-145w gear oil in there.
>his is what i found. no obvious difference period. maybe a >little more slippage, but im still shifting at or before 15mph.