pennz syncromesh can be had at Auto Zone for $6 bucks a bottle... its whats required in Geo metro manual gear boxes as well..... lots people ripping people off all over at stores and the net for the stuff, seen it clear up to 20 bucks a bottle.
the consensus is. . and beleive me its been debated to death on the metro forums even by oil experts is ... . you run the Penzz or the Amsoil for the proper protection..... anything else does not work in the long run. if your bored hit a metro forum have a few spare hours and do search kinda interesting to read at least once, a very technical read, lol.