synthetic gear oil

[norman lovie]

i,ve had good success with other gearbox's using AMSOIL SAE 75W-90 synthetic extreme pressure lub.
it's previously sticky tight synchro's and generally provided a nice smoother selection

would this be compatible inside the lotus box: or is it a no no
i,ve got plenty of this expensive oil, would be a shame not to use it if I can ?

[madbilly]

Check the specsagainst that for the approved oil Castrol TAF-X. It's also worth looking into whether any of the chemicals in the oil are likely to be incompatible with the materials in the gearbox, but I think this is very unlikely as I think this issue only affects older gearboxes. Also, do you have an LSD fitted? If so then the oil should match the one recommended by the LSD supplier.

[norman lovie]

thanks - that gives me the answer - happy to use it - as said - i,ve previously found amsoil very good

[ccb056]

Here's my story on the Gearbox oil:
viewtopic.php?p=261601#p261601

Bottom line, if you like Amsoil, the Amsoil Gear Lube 75W-90 API GL-4 (MTG) should be fine.

It looks like the AMSOIL SAE 75W-90 synthetic extreme pressure lube is an API GL-5 oil, the Lotus spec is GL-4.