dennis@home wrote:
"john2" wrote in message
...


Depends on the engine management software. My old Saab 9-3 LT gives 10%
improved consumption using "big name" brands like Esso or Shell compared
to the bottom of barrel stuff from Tesco, Asda and cut price independents.
So for paying 1-2% more there's a 5-fold return.


That is unlikely.
There is virtually no difference between them and they frequently come from
the same tank.

I have had good results from supermarket petrol but other times it feels
like I just piled a few heavy bags of sand in the boot when I filled up.
Also big name petrol at a price that sounds too good to true is usually
a disaster. I really think there's something going one here, not all
big name 95 petrol is the same and garages selling it really cheap must
be mixing it with something else or selling something different to the
label.

If your local supermarket petrol is reliably good, then fair enough, but
round here they certainly aren't.

john2