Anyone have any experience with this:
Shell MTX Fluid
Product Code: 59419
Shell MTX Fluid is a fully formulated synchromesh transmission fluid (STF) for use in manual transaxle/transmissions. It offers excellent synchronizer performance, oxidation stability, yellow metal compatibility, and low temperature performance. This product will satisfactorily lubricate manual transaxles/manual transmission from –40°F to +300°F.
It sounds like what we're looking for.