does supermarket diesel get as many mpg as an ordinary filling station??

JJ_Egan

Basics its the same fuel from the terminal
But additives are added as per the customers order .
Th claim that supermarket diesel messes your engine does not really hold true for me .Vast majority in the UK fill up at the supermarket and therefore diesel problems would be a huge nationwide issue .
I have tried the supermarket and non supermarket and the V Power stuff any slight extra mileage is ruled out by cost and never the same driving conditions .
Read
http://www.rac.co.uk/forum/showthread.php?1515-Petrol-Quality/page9&

ballyblack

you can add an additive like Redex to supermarket fuel petrol/diesel if you think you need to? Usually £5 to treat 2 tank fulls. On sale in Tesco now at only £2



.

almillar

Firstly, can we please separate petrol from diesel - OP is talking about diesel.
Secondly, we need to treat older 'DERV' cars differently from the common rail stuff, which is much less tolerent of fuel.
All the fuels will comply to a British Standard, unless something has gone wrong, so there's no bad diesel, just compliant diesel, and potentially better diesel.
Maybe it gives better performance, maybe it cleans the inside the engine. Maybe cleaning inside your engine is good, maybe it's bad!
Anyway, what OP should do is fill the car up for her husband, pay in cash, and let him tell her whether she filled with supermaket diesel or not... (a blind test).

motorguy

Honkycat wrote: »

I once attended a "safer driving" course run by my company in England. During this, the external consultant mentioned that supermarkets added what he called "cake" to their fuel and for that reason it should be avoided. I've never used it since and have often wondered if it was really that big a deal, so it's interesting to see that others have heard this too.

The cake in question was fruitcake was it?

robin58

Used to have a Peugeot 205.

Always used to run better on Shell petrol than anything else.

Would always get better mileage and less mechanical problems when filling up with their fuel than the supermarket stuff.

But usually the best way to save fuel and get better mileage is to not have a heavy accelerator foot and not drive like a F1 driver.

Honkycat

motorguy wrote: »

The cake in question was fruitcake was it?

Haha, we did actually have a laugh about that at the time when a couple of people raised their eyebrows.

qwert_yuiop

motorguy wrote: »

The cake in question was fruitcake was it?

See above. Yawn.

Look, folks, it's guff. If there were any differences in any supermarket diesel and bp, shell, whoever fuel it would be a major scandal and not a topic for debate on an obscure ni corner of a website. By the way, maxol is not a major international oil giant - it belongs to a family called McMullen.

These stories remind me of weird tales I used to hear in canteens when I first started wandering around. Someone's cousin's friend would have a friend who went to Disney land and had her children stolen. This person was always from far enough away that the tale could not be corroborated by stepping out into the street and asking someone - if we were in omagh,this would have been a friend from newry, in ballymena, the friend was a lurgan girl. The same nonsense was talked in every canteen I went to, none of these horrors ever featuring on tv or papers. Then the mccanns lost their daughter and we found out what really happens.

motorguy

Well, i've been using predominantly supermarket fuels in my golf 1.6TDI for over a year and "brimming" the car each time and calculating the exact MPG.

So these are ACTUAL figures, not just "well when i drive my car on BP i reckon i get 5mpg more than in ASDA" or "i'm sure my car runs better on Shell fuel"



As you can see, economy - rather expectedly - drops by around 10% over the winter no matter what fuel brand i'm running on BUT of interest, the highest recorded premium brand fuel - BP - got me 68.91mpg, and the highest recorded non premium brand fuel - ASDA - got me 69.82mpg. In fact i've subsequently got 70.02mpg using TESCO fuel over an entire tank.

darwin-rover

The other half and myself owned a VW Lupo for 13 and a half years (bought from new) . It was filled with Tesco petrol about 9 times out of 10. Ran fine all that time and the engine was still sweet as a nut when we got rid of it with 110k miles on it.
I noticed I got slightly more mpg out of it when run with BP super but not enough to justify running it all the time.


I can remember the arguments about supermarket fuel when they starting selling it. This was at least 20 years ago.

motorguy

Just saw this comment over on pistonheads when talking about "modern" diesels.

http://www.pistonheads.com/gassing/topic.asp?h=0&f=23&t=1484797&i=60&mid=&nmt=

"Bought my VW Passat 1.9 tdi Highline new in 2004. It's done over 200000 miles now and runs great. Serviced throughout its life at extended service intervals of 20000 miles. Run on supermarket diesel for its entire life. Great car, never let me down."