Ford diesels dont like sainsburys

bigjl

Just to add more weight to my opinion that supermarket diesel make Ford Diesels (I think Euro 4 onwards is the general consensus) run badly would simply be that I didn't beleive it would make any noticable difference before I experienced it in my own Mondeo TDCi.

And all those demanding proof, well my situation should be all the proof you need in an internet discussion, this isn't a court of law, it is a forum where people put forward their opinion.

I would say that the people best positioned to comment are those that thought it wasa load of cobblers only to have their opinion changed with personal factual experience.

And if anybody thinks that supermarket fuel is exactly the same as Shell, Esso or BP when it comes out the pump is kidding themselves, does everybody remember that issues with contaminated petrol in East London and Essex a few years ago?

A bit like somebody saying that Tesco brand Jaffa Cakes are exactly the same as the proper ones, anybody that says this is either uninformed or have no ability to taste.

I don't remember the problem affecting BP, Esso or Shell then?

Inactive

bigjl wrote: »

And if anybody thinks that supermarket fuel is exactly the same as Shell, Esso or BP when it comes out the pump is kidding themselves, does everybody remember that issues with contaminated petrol in East London and Essex a few years ago?

Correct, I have avoided Tesco and other supermarket fuel ever since.

Lum

Some Tesco own brand stuff is made by the same manufacturer as the branded product. Of those some are not made to the standard, but use a cheaper recipe than the branded product.

Fuel falls into that last category, as do Jaffa Cakes. Tesco Jaffa Cakes are awful.

Mark_Hewitt

Nilrem wrote: »

taxed at a different rate/cheaper due to it's lower quality.

Point of order here. Fuel isn't taxed due to quality, it's due to its intended use. Hence why marine use is taxed differently from road use. The fuel may well be of a different quality grade, but that has no relevance to the tax applied.

masterlumps

i think it is fair to say the supermarket diesel may not be as good and perform as well as the main brands, but to say it has the same effect as filling up with petrol can only be considered as total bollox

Lum

masterlumps wrote: »

i think it is fair to say the supermarket diesel may not be as good and perform as well as the main brands, but to say it has the same effect as filling up with petrol can only be considered as total bollox

I'd agree with this.

It's not unheard of, however, for a garage to put petrol in the diesel tank by mistake, but this is just as likely to happen to Sainsburys as it is to any other establishment that's mostly staffed by unsupervised spotty 16yr olds doing a 12 hour shift.

almillar

Diesels are getting fussier and fussier about what they run on, no doubt. Since the Common Rail and high pressure stuff came along, the stuff coming out of the Forecourt has had to be regularised and improved greatly.
But anyone claiming to get 2mpg more on expensive stuff, you'd better drive extremely regular routes, in exactly the same way, with exactly the same amount of traffic, to be able to put that down to the fuel used.
Even if a car feels different, the weather needs to be the same, and you need to be testing from cold every time for your results to be valid.

bigjl

almillar wrote: »

Diesels are getting fussier and fussier about what they run on, no doubt. Since the Common Rail and high pressure stuff came along, the stuff coming out of the Forecourt has had to be regularised and improved greatly.
But anyone claiming to get 2mpg more on expensive stuff, you'd better drive extremely regular routes, in exactly the same way, with exactly the same amount of traffic, to be able to put that down to the fuel used.
Even if a car feels different, the weather needs to be the same, and you need to be testing from cold every time for your results to be valid.

And that is exactly what i do, I do the same journeys day in and day out in my own car.

And at work the vehicle is driven the same way all the time, flat out most of the time and then ticking over for a period of time, with occasional drives about the area to be covered at normal speeds.

The shift times I work to are also the same every week, 13:00 to 01:00 on the same days of the week every week.

I don't, unlike some perhaps, post up information and figures unless I have actually put in a bit of time and researched the issue first.

If I think my research, done in all honesty to stave off boredom half the time, is relevant I will post it up.

If my experience is contradictroy to somebody elses opinion that may not be based on practical experience then I will put forward my opinion.

If I have no knowledge or experience on a subject i may put forward and idea or theory, but would normally make sure it is known that it is just that, or at least if I remember to it should.

What relevance does starting from cold make, as the car is only cold for a very small period of time in the driving day.

Though in my situation my work car is driven from cold, for up to 13 hours a shift.

My own personal mileage is also the same every day, same roads, same time of day, almost identical traffic every day.

But remember 17mpg to 19mpg is a huge percentage increase, so not really going to be affected much by slight differences in temperature and traffic.

And when you put fuel in that makes the car drive like the handbrake is on is also a fairly obvious situation, if there was no difference in fuel quality then you couldn't tell the difference.

In my own experience in my own car I can't say i have put "super diesel" in it very often, certainly not enough to get any quantifiable results.

And the reason I did it with the works Zafira is A I don't pay for the fuel, and B I was genuinely curious to see if there was any fact to the advertising blurb, and considering I drove the same Zafira for years not days any differences that where evident seemed to me to be relevant.

Again, this is all in my opinion and anybody is welcome to disagree, but this opinion is based on my experience so it won't be changed.

If I had found no differences then I would post that info' also.

Though I think the Euro 4 spec is a relevant thing to consider, with new technology and finer tolerances and specs needed to get full performance and improved emissions I think it is very possible that such highly efficent engines would be very likely to show up any differences in quality of fuel. And be very sensitive to such differences that wouldn't be noticable in older engines.

Though I also agree that I don't think it can be as bad as putting in petrol, as that can cause damage not just iffy running.

Possibly the OP not only had low quality fuel but perhaps some contamination also?

Dick_Turpin99

I would suggest the following points......

1/ Fuel injection eqpt. is generic Bosch or Delphi across a wide range of cars, to the best of my knowledge Ford do not make fuel injection eqpt.

2/ What was the failure diagnosis (root cause) of the fuel pump (and/or injectors).....was it dirt, water or cavitation failure?

3/ Does the car have manufacturer's warranty and what do they say?

4/ If the fuel was contaminated by dirt the filter should have trapped it....if not the filter is not to specification.

5/ Does the fuel filter contain a form of water seperator/warning light to signal the presence of water in fuel?

6/ Do Trading Standards continually monitor the quality of fuel sold to ensure quality is maintained?

7/ Is the fuel station expected to record a fuel sample of every delivery of fuel?

Dave101t

im in an 08 reg mondeo 2 litre diesel, always use sainsburys or morrisons, never a problem and im on 55mpg.
diesel doesnt come in grades, diesel is diesel. unlike petrol, 93/95,97, special, super premium.

if your having a problem id suggest letting a man fill the car...