The 5 speed trans on my old '76 Honda Civic used motor oil, and Honda told me it was OK to use Mobile 1, but my synchro's were gone before the warranty was up, and they were not real happy about repairing them. I don't know if it was the Mobile 1, though, because I heard a lot of people had problems with '76 Honda synchros. I used Mobile 1 in the engine as well, and it made it out of warranty before it needed a ring and valve job, the Honda area rep had to referee that one.
2003 Firemist Red/grey leather SL 500
2015 Palladium Silver/black mbtex GLK 350
1987 Smoke Silver/burgundy mbtex 300E Sportline (SOLD)
Click to see 87 300E