I think this thread has got a bit mixed up between people talking about normal v premium fuel and normal supermarket v normal branded fuel.
Diesel - Normal Or Premium
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Can't help thinking that if Rolex made a diesel additive then there would be a market... 
Very possibly - although it was a lot of years ago because of the surreality of some aspects of that meeting I still remember it reasonably well. I was representing the American heavy duty engine plant (The UK plant had been closed a few years earlier) and my focus was more for keeping the Munich production line running and support for any early life failures. From memory, the meeting was split into two and you will have been with a colleague of mine (for that customer I think it will have been Darren) for the transitional warranty type coverage.
I'm out of that industry and now work for a large energy services company which has customers that have been mentioned in this thread.
I think you’re right!
So to clear it up in my head..
Standard diesel is all the same regardless of what garage you buy it from because it all has to meet the same standard and probably all comes from the same place.
Premium diesel is definitely different because it has additives in it, however there is no actual conclusive proof that it makes any difference other than the fuel companies marketing and anecdotal evidence.
That about sums it up.
That's what I use. Don't spill it though, very smelly
@Neil Nicholls do you notice any difference?
No, cant say that I do. I just like to think that its doing some good
Purely for longevity
That’s not quite right, all road diesel has to meet the EN590 spec but some EN590 fuels are better than others, these better ones tend to be from the main fuel brands.
All diesels have additives in them even the cheapest of the cheap as they won’t achieve the std without them, let’s just say premium has a 5 star additive pack whereas the others have less stars.
As to it being better, we’ll it is but whether this has any real benefit to your engine or wallet is unknown as there are so many variables, it’s a bit like saying a good quality bucket will mean your van is cleaner than it would be using a cheap one, it might be but there are so many variations it’s impossible to say for sure.
In my experience bunkered fuels and cheaper supplies will have a greater bio content and reduced lubricity. In diesel bio means water which is the enemy of your fuel system due to the high pressure and tiny tolerances.
Hmm, had a slight rethink on this due to recent circumstances.
I'm currently working on a contract near Basingstoke, started about a month ago, and it's about 160 miles round trip same route there and back every day.
I normally fill up at the local Tesco, which is on the way to the motorway, mainly because I use the Clubcard points for my Euro trips.
However, a couple of weeks ago I had to fill up at the nearest fuel station to site which just happens to be an ESSO station. By mistake I used the Synergy Supreme+ diesel.
What a difference.
Euro 6 102ps engine is definitely more spritely than before, and up a couple of mpg on the daily trip.
Oh, and the Adblue consumption has dropped slightly as well.
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How long does 5 litres last?
What’s your opinion on cetane boosters?
Not tried them in a VW but I have added Miller's Max to Defenders, the later 2.2 and 2.4 versions and after many tankfuls in each I decided that a premium diesel worked at least as well.
Depends how many miles you cover I suppose. I do between 3-500 miles a week, and it lasts for ages.
You only add a small amount
I do about the same mileage, do you notice any difference while driving, or do you add it for longevity?
Or both ?
I don`t notice any difference, but then I always add it.
I hope it gives a little extra mpg, and really add it through habit as much as anything.
It made a big difference when I ran on veg, so I know it works
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