You don't see premium diesel offered very often. This is probably why.
Excerpt:
Why you should avoid using "Premium" Diesel
It’s natural for most car lovers to get tempted in choosing premium diesel. After all, we love our car, so why not feed it with a diet of premium fuel like Xtra mile, Turbojet or Hi-speed? It’s human tendency to be swayed by deceptive marketing claims and the belief that a higher price usually means a superior product. Oil companies keep harping on their claims of better fuel efficiency & an increase in power from their premium range of fuels.
Do these fuels deliver on their promise? In one word,
NO. Premium diesel is basically regular diesel with some cleaning additives thrown in. They do nothing to enhance the power or fuel economy of your car. Fact is, when the oil companies were pulled up by the MRTPC (
Monopolies and Restrictive Trade Practices Commission), they were unable to prove that premium fuels make good on any of their claims. Oil companies don’t even share the exact chemicals that are used to formulate premium diesel. It is noteworthy to mention that all of them source detergent-based additives manufactured by
Afton Chemical (part of the NewMarket Corp).
Car manufacturers such as Maruti, Hyundai, Tata, Toyota, Ford, Skoda, Mercedes, BMW etc. strongly discourage the use of premium diesel in their cars. Makers of the national engines of India (
Fiat 1.3L MJD & Nissan 1.5L DCi) do NOT recommend using premium diesel either.