Supermarket fuel

The only thing that has improved with deisel fuel that I have noticed over the years is in a real winter freeze  not having to hold a lit rag under the fuel line to make the fuel liquid,, antiwaxing additive

Or a rolled up newspaper dipped in the tank. Happy days!

There is definatley a difference. My Audi will not run on ordinary pump fuel anymore. It's 12 years old and the quality of fuel has dropped below what the computer can cope with. It has to have Nitro+ or the yellow light comes on. And the turbo cuts out.  It may just be the addatives but they make a hell of a difference. Only other option is a full remap. Think I will stick with the Nitro. It works. Why do so many cars have trouble with injectors & fuel pumps? It's the fuel people put in them. You get what you pay for. Bioethanol is too dry & it kills the seals. The addatives contain lubricants to combat that. So believe your AA man. He knows what hes talking about because he sees the results every day. On the hard shoulder.

There is definatley a difference. My Audi will not run on ordinary pump fuel anymore. It's 12 years old and the quality of fuel has dropped below what the computer can cope with. It has to have Nitro+ or the yellow light comes on. And the turbo cuts out.  It may just be the addatives but they make a hell of a difference. Only other option is a full remap. Think I will stick with the Nitro. It works. Why do so many cars have trouble with injectors & fuel pumps? It's the fuel people put in them. You get what you pay for. Bioethanol is too dry & it kills the seals. The addatives contain lubricants to combat that. So believe your AA man. He knows what hes talking about because he sees the results every day. On the hard shoulder.

Write your comments here...could it not be down to 'old age'? I for example have a better diet today than 50 years ago but I can't run as fast or for as long! May be it's the aged Audi rather than the fuel!

I can remember my father putting a couple of squirts of Redex in the tank when he filled up. Subsequently I believe that it has been proved that it did no good whatsoever.

The petrol situation is the same as supermarket food own brands that are actually from the same factory as the branded goods and identical in every way e.g. Cornflakes. People still convince themselves that the branded goods are better.

Happy to use branded, we run a fleet of vans, we ran them on supermarket for awhile and then on branded, we get 3mpg better on branded, our emissions are lower at MOT time, the run better and our servicing costs are less.

You may well do that and have found that, but it has nothing to do with where you bought your fuel!

The only thing you have is anecdotal evidence and have made a correlation where there is no causation.

Unless you have run randomised double blind trials and have statistical data to back it up, all you have is a feeling.

Yep, it's a feeling alright, when I look at the emissions read out, the mpg read outs and the bill for the servicing, strange the feelings you get with your eyes.

 ..... People still convince themselves that the branded goods are better.

but I KNOW that Heinz Beanz are best  .... I (help) make them 

There is definatley a difference. My Audi will not run on ordinary pump fuel anymore. It's 12 years old and the quality of fuel has dropped below what the computer can cope with. It has to have Nitro+ or the yellow light comes on. And the turbo cuts out.  It may just be the addatives but they make a hell of a difference. Only other option is a full remap. Think I will stick with the Nitro. It works. Why do so many cars have trouble with injectors & fuel pumps? It's the fuel people put in them. You get what you pay for. Bioethanol is too dry & it kills the seals. The addatives contain lubricants to combat that. So believe your AA man. He knows what hes talking about because he sees the results every day. On the hard shoulder.

Wow, not really sure where to start (is this s serious post?)

Standard ecu fuel maps are very conservative to allow the vehicles to be sold all over the world where the fuel has lumps in. Additionally the ecu has no way of knowing what fuel you have put into the vehicle so nothing to do with UK fuel nor to do with the ecu.

Are aware of how a turbo works? It is a twin sided turbine mounted on a single shaft, the exhausted gasses spin the turbine and the other half of the turbine compresses air coming into the engine, such that more fuel can be pumped into the cylinder on each stroke, because there is more air in the cylinder. The turbo cannot just cut out (without being broken and needing replacing)  and certainly nothing to do with fuel!

Ethanol is too dry? What does that mean, it not wine or martini we are discussing! And even if it does affect seals (which I will not argue with) there will be exactly the same amount of bioethanol in your nitro+ as the standard fuel because that is what it is made out of!

The additives do not typically contain lubricants, lubricity is added into the base fuels at initial blending to combat the loss of sulphur components and now has higher lubricity than when fuel had sulphur in it. The additives are largely cetane, with various other bit in and you get a spoonful in each tank!

You could believe your AA man....but then you'd be as wrong as the info in this post too!

Happy to use branded, we run a fleet of vans, we ran them on supermarket for awhile and then on branded, we get 3mpg better on branded, our emissions are lower at MOT time, the run better and our servicing costs are less.

You may well do that and have found that, but it has nothing to do with where you bought your fuel!

The only thing you have is anecdotal evidence and have made a correlation where there is no causation.

Unless you have run randomised double blind trials and have statistical data to back it up, all you have is a feeling.

Yep, it's a feeling alright, when I look at the emissions read out, the mpg read outs and the bill for the servicing, strange the feelings you get with your eyes.

Feeling with your eyes....really!

Sorry, but a feeling is all that is, you have not undertaken a proper trial and are therefore drawing incorrect conclusions which is costing your business money. 

I know you won't be persuaded, that is the nature of 'faith in ones belief'. 

I wish you all the best - merry Xmas! 

I do not check day to day driving as the results would not be consistant. Using the cars figures towing Tesco diesel does appear to give slightly better figures than Esso but not a scientific test.