I used to have a 400 mile round trip at the start of every week, out Monday morning and back Tuesday evening, pretty much same speed / traffic every time and most of the journey on cruise control. On my old car it really liked the Esso premium fuel, but only a 5-6% improvement in economy for the extra 10% cost, but the expensive BP stuff made no odd to it.
When I changed cars I found it made no discernible difference to my new car regardless of what I chucked in.
No idea if these expensive fuels do much other than cost a lot, you see many high mileage vehicles run on cheapo fuel - except that one time when some supermarket had really duff fuel that f***d up cars.
I fill up wherever is cheapest typically, occasionally I might put a premium fuel into the bikes, abroad I avoid the Ethanol fuels as much as possible, maybe the odd tank from a motorway station and when leaving the bikes sat around a lot over winter I use fuel stabiliser which is pretty cheap anyway.
When I changed cars I found it made no discernible difference to my new car regardless of what I chucked in.
No idea if these expensive fuels do much other than cost a lot, you see many high mileage vehicles run on cheapo fuel - except that one time when some supermarket had really duff fuel that f***d up cars.
I fill up wherever is cheapest typically, occasionally I might put a premium fuel into the bikes, abroad I avoid the Ethanol fuels as much as possible, maybe the odd tank from a motorway station and when leaving the bikes sat around a lot over winter I use fuel stabiliser which is pretty cheap anyway.
