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Is it my imagination

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Old Jun 12th, 2018, 18:41   #1
oldgreybloke
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Default Is it my imagination

I usually by fuel from Morrisons (I know, I know). However, before returning from Devon on Sunday I decided to give the old girl a treat and filled up with Vpower. Not only does it seem to run more smoothly and quietly, it used less fuel on the return journey despite similar conditions and weight. The fuel usage is objective but am I imagining the better performance (in order to justify the exorbitant cost perhaps)?

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Old Jun 12th, 2018, 19:24   #2
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Not sure about petrol, but when I had my LPG V70 it would definitely run better and give more mpg when I filled up with "branded" gas as opposed to supermarket gas.

The technician who serviced the gas system once told me that he could tell the difference between cars run on cheaper supermarket gas because their LPG filters were always more clogged up with sediment. (He used a more descriptive term rhyming with "hit"!).

His theory was that the big oil companies refined their own product and so had better quality control, whereas the supermarkets bought any old rubbish from anywhere, just as long it was cheap.

Not sure if the same applies to petrol, but it kind of makes sense.

The other thing is, BP, Shell and the like do all market their premium products as having performance and economy benefits. And it is illegal to make claims for a product unless they're demonstrably true.

Others may post answers that argue that petrol is all made to a standard, and others will argue the opposite and produce science to prove the point.

But I'd tend to agree with the notion that the premium fuels do indeed have benefits.

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Old Jun 12th, 2018, 20:56   #3
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Vpower is a better quality fuel than standard so not really comparing like with like.

When I used to have my Scooby I could tell & it was proven on a rolling road that running it on supermarket standard fuel gave less bang for my buck than running Shell Vpower, however Tesco Momentum 99 was very very close to Vpower.

Not sure on Diesel not tried it yet, maybe something to do during my 600mile round trip at the weekend.

I would add that I live nearby the Fuel depot at Jarrow & see tankers for numerous different branded & Supermarket retailers leaving & arriving. The fuel all arrives by train.
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Old Jun 12th, 2018, 21:05   #4
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I found the drive home from a camping holiday on several occasions I would use noticeably less fuel and the engine seemed to fun better even just on standard Shell petrol compared to the supermarket fuel I usually use.
Have yet to test whether the same occurs with diesel, but hope to find out soon.
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Old Jun 12th, 2018, 21:11   #5
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For my little lorry, I fill her up at the local haulage yard at cost. ( good friend of mine) I pay £1,11.
Got caught out about a week ago and had to fill up with shell at a proper petrol station at £1.35. I wondered if it would run at all with all the tears that fell into the tank while I was filling her. But by jove it ran lovely. Noticeably more power. Was it better quality derv or the addition of salty tears?
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Old Jun 12th, 2018, 22:51   #6
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yes there will be a deference. cheaper fuel is just basic blended fuel where Vpower and other branded premium fuels are cleaner and have added chemicals and cleaning agents which raise the octane and help them burn cleaner.
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Old Jun 12th, 2018, 23:02   #7
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I would normally rubbished the idea, but recently have switched from supermarket diesel to standard shell and am convinced it's quieter and marginally more efficient.
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Old Jun 12th, 2018, 23:17   #8
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Thanks all. I should have made it clear that it was Vpower diesel but no matter. The consensus seems to be that it is probably better quality thansupermarket offerings although the mileage gains don't really justify the eyewatering price. Unfortunately I had to fill up on the A30 and paid a premium for that. Perhaps an occasional treat to help clear her tubes.
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Old Jun 13th, 2018, 00:18   #9
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It’s likely you had a fair amount of diesel injectior deposits and the detergent in the v power has cleaned them up. You’ll notice improvements to fuel economy and performance.

https://www.lubrizol.com/Lubricant-a...ector-Deposits I remember seeing this at an SAE talk a few years ago, it’s rather impressive I would guess it’s whats in the premium stuff, but you never know.
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Old Jun 13th, 2018, 00:35   #10
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Quote:
Originally Posted by oldgreybloke View Post
I usually by fuel from Morrisons (I know, I know). However, before returning from Devon on Sunday I decided to give the old girl a treat and filled up with Vpower. Not only does it seem to run more smoothly and quietly, it used less fuel on the return journey despite similar conditions and weight. The fuel usage is objective but am I imagining the better performance (in order to justify the exorbitant cost perhaps)?

Use both sides of the paper and show your workings. Go.
I've recently started using Morrisons Super unleaded as apposed to one of the premium brands Super fuels.
I must admit I can't tell the difference apart from the cost, I'm hoping that it's as kind on my engine as it is my wallet.
On a 180 mile round trip yesterday It recorded 33.4 mpg and my computed mpg is pretty accurate.
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