migs would be the authority here as he sells the stuff...
i believe that synchromax can be for any vehicle even 4x4.
max gear is for heavy duty 4x4 or truck use.
depending on your vehicle, you'll find a RP product that will suit your needs.
i'll be using it for a front wheel drive manual tranny. mitsubishi lancer 2k glx in particular f5m41 tranny. according to my manual, i should be using 75w90 or 75w80 hyphoid gl-4 or higher compliant