Supermarket Diesel v's Brand Name Diesel

[JannerAudi]

A subject that has probably been discussed before but I would be interested in any thoughts or experience of supermarket diesel versus the brand names such as BP, Esso etc.

Also does anyone know of any in depth tests carried out on supermarket diesel v's branded diesel.

Thanks,
Janner

[Tripletrouble]

My friend Phil is a tanker driver. He hauls fuel from the same nozzles that go to Tesco, Asda etc as the fuel that goes to Texaco, Shell etc.
The only exception is the"Super" brands that you pay extra for.

[sbt]

hi all . now i aint no expert on this but there is one thing i do know . i once had to use supermarket diesel in my 1.9 tdi a4 and the engine sounded similar to throwing a bag of spanners down a very steep hill . so now i use shell diesel and my engine sounds lovely if thats possible for a 1.9 tdi . but you know what i mean

[man le-mans]

So why was it a few years back that only tesco suffered with water in the fuel and tescos had to pay out thousands for engine damages in hundreds of cars

[Trekmeister]

Every now and then a report is submitted by a reader to my local free paper complaining of contaminated fuel from my local Tesco. The store denies this stating if that were the case everybody who used their fuel would suffer the same fate. Those who've reported state they've filled up and within miles their cars have died. Garage reports state contaminated fuel. As a result local taxi drivers refuse to buy their fuel. I use shell and never use supermarket fuel.

[man le-mans]

When this happen few years back I knew 4 people who's cars had died after the fill up all at the same time. I think they had petrol cars but I could be wrong on that. I use BP, Esso, or sainsburys, tesco depends where I am at the time

[ukgroucho]

And I use the premium stuff.. BP Ultimate for the most but not harm in mixing it up with other premium brands occasionally (actually it is good practice to do this as they have different additives and clean in different ways so a regular BP user should throw a tank of Shell or whatever premium fuel through occasionally).

sbt.. when I had an A4 1.9 Tdi (on a P plate) I mistakenly filled it with BP Ultimate once - I realised when I paid... on the subsequent 100 mile motorway jaunt I could not believe how quiet and nicely it was running and then put 2 and 2 together. Whether it actually improves performance or economy I don't know but I do know that that 4 pot engine ran much nicer on it. I've used it ever since although on 6 cylinder 3.0 Tdis

[diecastsink]

As you may have noticed, 4G 3.0 TDI engine code CDUC is a bit noisy when stopping the engine, like said throwing a bagful of drop-forget spanners onto a garage corner. Neste introduced Pro Diesel some time ago, and even after one tank the engine runs smoother, and stopping is not so noisy. I did not noticed any fuel saving as they officially tested and reported, the weather conditions are a bit different here and we have to use at least winter (down to -32'C) or arctic (-37'C) quality fuel. So in addition of palm tree oil we had wallnut cyrup oil! Also there were significant difference in aux heater operation (even local heater dealer denies). It's all about the additives what the brands are using, but the effect is only noticed when you change the supplier, or if they change additives. In a long term, the noticeable effect disappears into the white noise. In UK, you of course have more suppliers so there certainly are more variation.

[starsky365]

I had this conversation with a petrol station owner when I filled with BP as I'd put morrisons diesel into my old C6 and very nearly took it to Audi as I thought there was something wrong with it, no power, noisy etc

What I was told was.........

1. The base fuel for supermarkets is sourced from the eastern block where it is not as pure anyway and has a higher biofuel percentage

2. The tanker driver swipes a card through the machine on the tanker at each delivery point this ensures that the correct mix of base fuel and additives/lubricants are mixed from the different compartments in the tanker at the point of delivery.

3. the supermarkets don't have any of the extra cleaners/lubricants dispensed

This of course could be total crap; I'm only repeating what I was told


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[Passatier3]

And I use the premium stuff.. BP Ultimate for the most but not harm in mixing it up with other premium brands occasionally (actually it is good practice to do this as they have different additives and clean in different ways so a regular BP user should throw a tank of Shell or whatever premium fuel through occasionally).

sbt.. when I had an A4 1.9 Tdi (on a P plate) I mistakenly filled it with BP Ultimate once - I realised when I paid... on the subsequent 100 mile motorway jaunt I could not believe how quiet and nicely it was running and then put 2 and 2 together. Whether it actually improves performance or economy I don't know but I do know that that 4 pot engine ran much nicer on it. I've used it ever since although on 6 cylinder 3.0 Tdis

Same here.