We use mustard oil usually because its healthier than refined oil, so we mostly buy kachi ghani mustard oil of different brands. Some are good and some are not, fortune mustard oil comes under this category as on heating it gets dark color instead of becoming lite yellow.
Oil doesnt looks pure and I doubt it may be adulterated. The sabzi tastes slightly different too and we are not happy with this oil.in future we wont buy this brand oil for sure. I would advise others also not to buy fortune oil.