Most of the answers are correct about diesel being synonymous with gazole, but most answers are wrong about the extra and supreme gazole. The supreme gazole has more/better cleaning additives. Here is what Esso has to say:
What is our Esso Synergy Supreme+ Diesel fuel made of?
Our Esso Synergy Supreme+ Diesel fuel is designed to clean diesel injectors more thoroughly than our Esso Synergy Diesel fuel, removing deposits, to help improve your engine’s power and protect against corrosion. Tests on cars used daily show that Esso Synergy Supreme+ Diesel fuel reduces fuel consumption by an average of 1.8%, with savings of up to 2.8%.***
While driving through France Sept. 2019 we frequently encountered pumps vending two grades of “gasoil” (what the French call diesel fuel). One was labeled simply “gasoil” and the other something like “super” or “ultra” gasoil, both of the same brand. My diesel driving brother-in-law wasn’t sure of the difference and always used the cheaper of the two. We speculated that the potential differences could include cetane number, purity, detergent or lubricating additives, bio content, etc. I wasn’t confident enough of my French to ask an attendant.
Gazole and Diesel are synonyms – end of story.
Regarding the confusion over brand names such as “Gazole Supra!” “Diesel Ultra!” “Diesel Mega!” etc…
…for example Totale has “Total Excellium” !
http://www.total.fr/mes-deplacements/tout-savoir-sur-les-carburants-total.html
That is nothing more than a registered product name.
(Exactly like “Big Mac” or “Toyota Corolla”.)
BP has “ultimate” (for both Gazole-aka-Diesel, and, essence).
(Note that in that example it happens to be officially named “bp ultimate diesel” (apparently in lower case) and they add the word gasoil after that in the blue and green logo .. presumably because gasoil is more of a French word than diesel; you know about the requirements for French language in advertising in France.)
I believe the confusion over the addendum “extra” is that you are simply seeing product names, that have exciting words (such as “extra” or “ultimate”) added on the end.
There is no special meaning to “extra” or these other brand-names. And, certainly, gazole / diesel are precisely the same thing: there is absolutely no difference between the two – they are literally synonyms.
Gazole and Diesel are synonyms. They both mean diesel fuel, as opposed to essence or super (short for supercarburant, nobody uses the long form) which means usual car gasoline.
You must use the type of fuel that’s appropriate for your car, either gazole or super. I think that diesel engines are more common in cars in France than in most other countries.
The extra word extra means a type of fuel that has advantages compared with non-extra, either to mileage or to engine longevity. As far as I know, the term diesel extra is not regulated, it is only a commercial name chosen by this or that brand.
Credit:stackoverflow.com‘