I order diesel of around 50k every month for my factory and am trying to find if there is any method through which i can save some money on fuel cost??
Get some credit cards which gives around 5% or more cashback on fuel spends like bpcl sbi card (only works on bpcl pumps also you can't save on more than 10k worth spends in a month) or indian oil cards or hpcl cards (whichever pump you get diesel from).
I don't know any card which gives unlimited cashback so you might need to get 3-4 of these cards to save maximum. Also if possible you should get fuel from different company's pumps if possible like 1/3rd of the requirement from indian oil, 1/3rd from hpcl, rest from bpcl so that you can take advantage of all the different cards you can get. Just do some research.