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

snowmen

Most supermarket fuel comes from the same place as other filling stations. Not sure about the claims that it is any worse - have heard tales about independents watering down fuel.
As nodiscount and waltsalt say a lot of it depends on the car.


Most important thing about getting a good mpg is not so much about the fuel but more about how the car is driven. Have heard many people complain that they don't get a good mpg return on the petrol/diesel from a filling station and then observed them drive like maniacs going at 80 mph+ on the motorway and heavily braking coming up to junctions.


If they changed their driving habits maybe they wouldn't be so worried.

qwert_yuiop

If you put a brick in the cistern of your toilet it means you use less water every time you flush. I'm away out now to put a brick in my petrol tank.

Kernow666

its all basically the same the supermarkets buy from the big boys

you just get some proper teccy people on here answering that they track there miles and get 0.00000124157 miles to the gallon better if you drive at 56.214786 mph

Marktheshark

Here we go again, supermarket fuel ate my hamster...

qwert_yuiop

chrisross22 wrote: »

I used to track my petrol mpg and I definately got more from BP than the supermarkets.

I will only use BP now.

During this, the external consultant mentioned that supermarkets added what he called "cake" to their fuel and for that reason it should be avoided.

Who remembers bush and Blair and the mysterious "Niger yellow cake" before the Iraq invasion? Turned out it didn't exist. Is this the same stuff or just fruitcake?

Bigcammy

Don't know about MPG, but I used to use supermarket fuel exclusively and my diesel Qashqai ran fine for the first 6 months, then started to run poorly, best way I can describe it is that it was like a petrol engine running off a cylinder. Took it to a local mechanic who I trust and he asked was I using supermarket fuel. Told me to fill with BP Ultimate, then stick to the likes of BP and avoid supermarket fuel. Within 2 days the car was running smoother and was fine within a week. I now use BP almost exclusively, alternating between ordinary diesel and ultimate diesel and have had no issues since.

adouglasmhor

chrisross22 wrote: »

I used to track my petrol mpg and I definately got more from BP than the supermarkets.

I will only use BP now.

Supermarkets use detergents etc in their fuel where as BP etc put in additives which are good for the engine. The app to track mpg can't lie so I know that supermarket fuel is not as good.

Hillarious :rotfl:

Alikay

It's likely to be true that cheaper fuels will give lower mpg than branded due to the fuel additives added to basic petrol by the oil companies - premium fuels will contain more technologically advanced additives and in controlled conditions will give superior MPG, performance and engine protection.

Whether it's enough of a saving to make it worthwhile paying the extra for a branded fuel depends on lots of things like the type of car, condition and age of the car, conditions you drive in (motorway or city), climate etc. Even the specific pump you use to fill your car could affect MPG figures due to tiny variations in callibration of pump, which could add up to a variation of several ml on an average tankful.

DH has worked for fuel additive companies for nearly 30 years, and happily uses supermarket fuel in our cars.

davetrousers

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

That sounds VERY vague, I think I'd have quizzed him a bit more.

And remember winter diesel, can give you a lower mpg.

sinizterguy

davetrousers wrote: »

That sounds VERY vague, I think I'd have quizzed him a bit more.

And remember winter diesel, can give you a lower mpg.

Wax ... Forms a cake like layer on fuel in cold conditions.

Winter fuel additives work to reduce the formation of this wax layer ...


They don't add it in ... That would be daft ...


Other than that, I have never of heard of cake and diesel/petrol in relation to each other.