Experimenting with supermarket/branded fuels

Indout96

Same Car
Same driving style
Same route

You will have the same car / route (possibly) but there is no way you can say you had the same driving style as that would have to relate to other road users who will not be the same so your style adapts round them.

cardinalbiggles

8u87fhsd wrote: »

Octane levels - no ideas.

2.2 Toyota Diesel

Fill up on Asda regular diesel ~ over 6000 miles avg 42mpg
Fill up on Shell regular diesel ~ 23000 miles avg 48mpg

Ahhh a diesel. Anyway, you have a Toyota are you sure your accelerator wasnt sticking

Evilm

8u87fhsd wrote: »

Same Car
Same driving style
Same route
Asda avg 42mpg
Shell avg 48mpg

Even though Shell is slightly more expensive per litre I'm still saving money.

could the Asda pumps be off and therefor you are getting more fuel from Shell without realising it?

Tesco and Asda seems fine for hubbys car but a particular Sainsbury's and surprisingly an Esso near where we lived seemed worse somehow. I'm not sure it wasn't purely our imagination though since I don't have MPG to back it up.

thescouselander

I mentioned this in another thread recently. I have two petrol stations nearby, one supermarket and one proper petrol station. The car gets filled at whatever petrol station I'm passing when the light comes on. I've never been able to notice any difference between the two brands of petrol on any of the last 3 cars I've owned while living here.

rev_henry

8u87fhsd wrote: »

Octane levels - no ideas.

2.2 Toyota Diesel

Fill up on Asda regular diesel ~ over 6000 miles avg 42mpg
Fill up on Shell regular diesel ~ 23000 miles avg 48mpg

With diesel its cetane not octane anyway.
I haven't noticed any difference in MPG, and I measure it meticulously at every fill up. Haven't been to a non supermarket place for quite a while now as ASDAs always been about 3p cheaper than everywhere else. This is petrol btw...

8u87fhsd

Indout96 wrote: »

You will have the same car / route (possibly) but there is no way you can say you had the same driving style as that would have to relate to other road users who will not be the same so your style adapts round them.

Yes & no - I look ahead, try to minimise braking/accelerating (so try for steady 2000rpm/~ 60mph on m-way) so although I adapt speed, positioning according to other road users my style (no mad rushing about, don't accelerate towards red traffic lights etc.) doesn't really change

Bob_the_Saver

Convert to LPG, half the price of that petrol stuff & about 52p per litre here in France

Hammyman

newfoundglory wrote: »

Has anyone tired it with interesting results?

Yes. Over many years and with both diesel and petrol engines, both carburetted and injection, turbo, non-turbo, 4 cylinder, V6, using additives such as Redex and not using it that there is absolutely no difference whatsoever. The only noticable and quantifiable difference is when they switch over to winter diesel then summer diesel.

Hammyman

newfoundglory wrote: »

The sainsburys I used was 25 or 30 miles from Tesco so I can only think it came from a different refinery perhaps.

Unless it was in a different quadrant of the country, 30 miles wouldn't make much difference. Even a different county doesn't.

newfoundglory

Having filled up this morning with Shell regular unleaded I can report that my car does appear to run smoother. Examples include it not being near-stalling when revs are low... such as setting off from lights or reversing into the drive.

Im sure i'm not imaging it. My car has a pretty unrefined engine.