Has anyone else tried it ? I've filled up with it a couple of times before and noticed a definite performance boost, but it was only today, about 30 miles after filling up on the V Power Diesel that I noticed the dash estimating over 800 miles worth left in the tank. Normally that never goes above 590 when I fill up. It's based on the average mpg since you filled up last.
Thinking this was a glitch, I switched the display to show the current MPG and was gobsmacked to see that the car was managing 98mpg on the flat with the cruise control at 50mph. NINETY EIGHT MPG ! Once I got up to 70, it had dropped to 50-odd mpg. That's insane !!
I'm keeping track of the actual mileage I do until the next refuel, just in case the computer has lost its marbles or the fuel-flow sensor has had a fit, but so far I have no reason to disbelieve it. If it turns out to be correct, the extra cost of the V Power fuel will be hugely outweighed by the insane mpg I'm getting from it.
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Just look at the efficiency difference between 50mph and 70... you're burning nearly twice as much fuel just to go 20mph faster. If you don't want to do 50, try it at 60 - you'll probably find it's much closer to the 98mpg than the 50-odd.
It's not just high speed by itself that wastes fuel, it's constantly speeding up and slowing down, which is inevitable if you're trying to go too fast unless the road is totally empty. If you stick rigidly to a fixed speed your economy will improve. So ideally you need to find the speed which allows you to do that relative to the other traffic - I do tend to find it's just below 60, because that's very slightly faster than most of the lorries so it allows time to plan overtaking. Just by doing that I get almost 50% better fuel economy than I did when I drove more "normally" at around 70.
It's an interesting thought to realise how much we could reduce the consumption of oil if everyone did that... as well as the money it saves you.
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Most people don't think to check this, they just look at the pence per litre and think they're saving money, when they're actually burning more fuel and possibly shortening the life of the engine.
"Take these three items, some WD-40, a vise grip, and a roll of duct tape. Any man worth his salt can fix almost any problem with this stuff alone." - Walt Kowalski
"Only two things are infinite - the universe, and human stupidity. And I'm not sure about the universe." - Albert Einstein
I refuse to use supermarket petrol, have done for years.
I had an Astra SRi many years ago, and if I put supermarket (IE Tesco) petrol in, it ran like a sack of spanners. Yet if I put Shell (or BP Etc) in even the lower grade stuff, it ran fine. Ran brilliantly if I put in Super unleaded.
Also a couple of years ago, we (at work) had a spate of cars needing new Lambda (oxygen) sensors as supermarket fuel had contaminants (IIRC rubber particles) which were blocking them up.
And the winter before last the diesel from various supermarkets was (crystalising) freezing at well above the point it should have been (crystalising)freezing at, and blocking diesel filters.
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I have been running an experiment since this time a year ago, Shell normal unleaded vs V-power super unleaded. I switch roughly once every couple of months so I get a good flush out of the previous mixture each time. Apart from the extra cost I don't notice any difference in fuel consumption. If any thing the change of seasons probably affects the mpg more. My car isn't a performance model and doesn't require the higher octane rating.
I will continue to use branded fuel in my car but one thing I am starting to look for is fuel that includes less ethanol, I gather that it isn't good for petrol engines and that it is the green/sustainable lobby that force its use in Petrol.
I understand that some higher octane types have less ethanol in it. This could be reason alone to pay for the premium product.
Ringleader of the Cambridge cartel, pedal champ and king of the dirt boxes (down to 21)
I've not used Super Unleaded in my cars however always use it in Motorbikes. Better fuel economy and increased power. The extra MPG certainly outweighed the extra cost at the pump.
However these were all with carb based fuel systems not injection based.
Tightwad.
Thing is, it'd be like driving a Ferrari, hot chicks will swoon when you pull up at the kerbside in your Shell V-Powered Tranny tipper, lean out of the window, and ask how much it costs for a shag.
The only caveat to this is what @Axe_meister said about pinking, but if your engine is pinking on normal fuel then you've got far more to worry about.