project - Member
Stanlow refinery in Ellesmere Port, has Shell, Tesco , Morrisons, and dhl, along with many other tankers all filling up there, its when it goes in the underground tank or in the tanker they add an additive if they can be bothered , also does shell v power and texaco excellium actually do anyhing.
Filled up tonight with ESSO, and a big difference in performance.
Careful, this can be a false impression. Differences in fuels (particularly the RON rating) can cause the car to run differently until (in most modern cars) the ECU is abe to adjust the mix to the engines designed tolerance / preference.
Some performance engines (Subaru & BMW are an example) are designed to run on higher rated fuel for max performance, but cope adequately on your standard fuels.
Do some dedicated testing and you may find that after a week or so (dependant on mileage) you car will manage the same MPG and be putting out similar BHP of you have merely swapped Shell unleaded & esso unleaded.
Which mag did a test BTW that concluded for the majority of motorists, "Super unleaded" fuels were a greater expense ratio than they were a saving on MPG or increase on power - simply not worth the extra money.