Same price for Sainsburys diesel at my local. They dont even try to compete anymore with other supermarkets but then again its the same with Sainsburys food prices instore too.

​If you drive a ferrari then it will benefit you.

Of course you did...

I'm lucky to get 10-15 mpg let alone extra

I can only guess you drove up very steep hills to get there on tesco fuel & free wheeled all the way back down on shell fuel.

Lol , per tank maybe , not per gallon and even then this negligible amount could have been down to climate , traffic , all sorts of variables which would affect the comparisons.
Its almost impossible to do a mpg comparison with these small margins in 'real world' conditions.

Clown of the week!

You should alert Shell to this incredible increase in mpg. They could use it to market their fuel. An extra 15mpg would give me nearly 50% more mpg!.

I never notice any difference in my mpg no matter which fuel I use.

No clubcard / Nectar type schemes but their credit card has a good cashback rate and is ongoing , I get 2% off each spend on Asda Fuel and groceries and 1% off everywhere else .
For us our Monthly spend is around £600 just in ASDA (Fuel & Groceries) so £12 a month cashback for me.
In addition to this we easily spend £300 a month on other items too so that extra £3 cashback pays the monthly fee :wink:

Worth having a look if ASDA is your regular shop and/or your fuel usage is high. We got £12 TCB as well which is an added bonus.

Same here