sure it has everything to do with the ops question. the M & M act prohibits it with specific exemption.
Besides. Do you honestly think mahindra has an oil refinery. even if they sell their own branded oil.. someone else made it. Chances are.. the engineers used a set of book specs based onthe parts, and then reccomended an oil spec, and perhaps thru marketing agreement.. an oil brand. The M & M act prevents them from forcing you, without exemption or providing the oil or service free of charge.
that's the entire point of the law...
What he said (sound guy), OP run what ever brand oil you want to that meets the specifications, and yes Amsoil will stand behind their products, better than most.