I have a 2011 MY TD and have had a new EGR valve after the engine started to develop a "cough" intermittently. This cured the problem but the same is starting again...so it looks like it may be another EGR valve change. I have done 33,000 miles on the open road with little town driving, so I just can't understand why there is this EGR valve problem. Anyone else having similar issues?

see my post failed egr valve you are not on your own i am on my 3 egr valve in 32k miles and mine gets a run onthe m/way every week what fuel are you using branded or supermarket and whats the dealer said about it there is also a poll going on here as well rainy-city
xs

wonder if supermarket fuel is causing this ?

was tempted at Morrisons the other day, but resisted !! ( 6P off a litre )

Iain

Supermarket fuels should not be a cause unless branded fuels are also a cause. All fuel sold must conform to certain standards (BS EN 590 I believe). There is a strong likelihood that the fuel at stations in a particular area will be from the same refinery i.e. a Shell branded station does not mean it has come from a Shell refinery.

Refineries are big complex beasts which do not produce a massive number slightly different products. It all comes from the same tanks with what difference there is due to additives which and blended in right before it goes into the tanker. Its this what can give the diesel better specifications than required in the British Standard.

I work in the oil industry and buy the cheapest that I can find locally (usually Sainsburys)

A Total tanker driver told me much the same. Having said that, until the last fill up, I usually went for Shell. Recently I used Jet as it was 5p per litre cheaper. 10MY (Sept 09) TD4 HSE Auto in Stornoway Grey (Now Gone)

08 FL2 TD4 SE Manual in Rimini Red (Now Gone)

It's always been wherever I'm passing and need it, that can be Supermarket or branded.

and there was me filling up with BP Ultimate the other day thinking that it may be doing some good to my engine parts.

taken for a ride again !!

Iain

The BP ultimate and Shell V-power type diesels are a little different to the standard fuels. These are made from a different base stock which along with traditionally refined diesel and different additives, also contain a proportion of synthetic diesel usually derived from natural gas. This improves the cetane number and also (in theory) makes the fuel burn with less soot.

As with most topics of this type there seems to be HUGE amounts of discussion on the net with some people claiming improvements and other not. Its down to each individual to decide if using premium diesel is for them. I suppose in a way it is similar to the epic 2SO thread on here.

I personally use standard fuels so for me there is little benefit in using shell/BP etc, over a supermarket.

there is a known problem on one of the ford sites tdci c max and others having problems with supermarket fuel and owners are advised to avoid them, now with the 2011on these engines are a ford/ pergeot joint venture that l/rover are using have a look if you can find the site i think i found it under supermarket fuel,i do know that ldv maxus engine had issues with s/market fuel and they said that no warranty would be paid if it was found that fuel was used in the vehicle from certain super markets  rainy-city
xs

All fuel sold in the EU must conform to EN590, this includes Supermarkets and as such this is what engines are designed to run on. As I have said in a previous post, standard supermarket fuel comes from exactly the same base stock as standard branded fuel which does vary from batch to batch throughout the year. The only difference possible between the two is the additives.

I have heard that certain manufactures recommend using the premium fuels rather than the standard fuel but this has been high performance petrol engines which run better with the higher octain fuel.

it may do but why does certain car manufacturers say they do not recomend supermarket fuels for their vehicles and there are a couple of members on here that have had some issues with supermarket fuels with engine performance, changed to using vpower/bp /texeco special fuels and had no problem since using them whats the differace  rainy-city
xs

bigalf1961 wrote:

why does certain car manufacturers say they do not recomend supermarket fuels for their vehicles :

I'd like to see a citation for that statement unless its a high performance car

Maybe I have not really been explaining myself very well.

There is a difference between standard fuels and advanced fuels. Advanced diesel contains different additives (such as detergents) and synthetic diesel. This gives the diesel a higher cetane number and will in theory improve engine performance.

However, using bog standard shell, BP, Esso or any other branded diesel in preference over supermarket diesel will provide little benefit in engine performance - it all comes from the same tanks.

I also find it really hard to believe that any manufacturer would officially advise against supermarket fuels. Just think of the law suits that could be made from such an accusation that supermarket fuel is inferior! I can believe, and in fact have heard of cases myself, where manufactures have recommended an advanced, higher grade fuel in preference to the standard fuel.

One possible reason for the confusion here is that I am yet to see a supermarket selling advanced diesel so if this is your preference you have no choice but to go for the branded option. They do however sell advanced petrol e.g. Tesco Momentum.

Although I am not an engine or fuel specialist I am a process engineer and design oil refinery for a living. I do therefore know that there is not a special refinery somewhere pumping out cheap to be sold in supermarkets.

Buying fuel is a bit like buying a new tv.
Buy it from argos/currys/commet etc etc. They all buy from the same outlets etc etc.
Some want more profit than others. Supermarkets can afford to buy in bulk and also sell much cheaper as they hope you will shop there and the fuel thing is just an insentive to get you in thier stores.

have a read a this then it may explane why some engines run on supermarket fuel

GO TO TALKFORD.COM and look for supermarket fuel  rainy-city
xs