12 MPG (33% more effcient) between two types of fuel? That's bollocks, like others have said there's very little difference between the fuels, certainly not that much difference. I'm not denying what you observed but it wasn't down to fuel alone, speed, tyre pressure, weather, car load, A/C, driving style, traffic...etc all must have played a part. If a company found a way to make fuel 33% more effiecient they'd be banging on about it.
Youre going from hearsay and personal experience, i worked for the national petrol retailers association. I wonder which has more credibility and factual evidence....? Give the man a coconut.
Precisely, additives make the fuel stand out, shell and texaco do it best, supermarkets not so good. Supermarket fuel also leaves a lot more deposits in your injectors and engine aswell, it's nowhere near as good. Whether that's down to lower quality additives or just a poorer mix I don't know, but it does. I've also heard quite reliably (admittedly possibly biased from someone who is involved at a top brand garage, and not just working the counter before you say ) that supermarkets tend to get the 'older' fuel and that it can travel halfway round the country (something to do with swapping, can't remember precisely what he said) and can lose some octane when knocked about and left to stand, whereas shell, texaco and bp's optimum fuel is straight from the refinery and into the pumps, therefore being 'fresher'. I don't know how much truth there is in that as its just what I've been told but given what he does he should have a good idea of how it works. There's a lot more difference in the diesel as supermarkets dilute it with loads of biofuel, so if it smells funny that's because you've got half a tank of cooking oil
So you now admit you're going on hearsay and you dont have all the details whilst I handled media for the Director for the association of petrol retailers. Still, you're right and I'm wrong.
48 mpg was a bit of a freak results when I got stuck behind a tractor for miles on an A road. Never got close to it since. My regular mpg on the route is around 37.5/38 but when taking care accelerating can get it to 42, minimum 40 with traffic holding me up. Car load/tyre pressure isn't a factor, same load and I keep on top with my tyres. Weather could have helped affect but I've achieved all results throughout a cold wet winter so doubtful that's made too much difference. Air con never gets used. Driving style usually Colin McRae but going to work get stuck behind things in tight lanes which makes it impossible, so always the same I don't know if its in this thread or another burning posted about ecu's having to adapt to different fuel types over time rather than an instant impact (for better or worse) could also be a different additive mix meant I wasn't getting full efficiency out the fuel, but whenever I fill up anywhere other than shell and texaco there's a slight but noticeable dip in my low and mid range torque. The one thing that can't lie is the power tests I've seen using different fuels. While mpg may stay very similar the power drop can still be significant.
Facts I've experienced or seen evidence of first hand: Slight drop in mpg Power loss More deposits left behind Don't know if your much of a petrol head and like tinkering with cars and bikes and find these things out or even notice them? Everything else is hearsay, but I've heard it from someone involved working with the fuel, rather than someone who did a press conference for a fuel company.
That was baked beans. Home brand cheap ones that are as hard as ball bearings and taste of pump. The war is about to begin but I really don't care for it. I am not an insect, I am not a fly. It is beneath me.
Getting back on topic in an off topic thread, just paid 134.8 @ St Andrews Quay noticed Asda Hessle Rd was the same price
