I have just bought a toyota yaris diesel. can you tell me the best diesel fuel to use BP Ultimate or Shell V-Power,
Thank-you
Edited by Dynamic Dave on 21/11/2007 at 10:21
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Tesco, asda or morrisons regular diesel is fine, buying exotic fuel for your Yaris at 110p a litre will make not a jot of difference.
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< Ulla>
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I think you would be wasting your money on v-power diesel or ultimate.
I would never put supermarket fuel in my car in light of the recent fuel contamination events.
I would use shell diesel in your car. Its a very good fuel and supposed to have higher concentrate of cleaning agents and additives that will only benefit combustion and the daily running of your engine.
I was filling up with V-power diesel in my 2.2 D-Cat T180 recently until it became very expensive. Back to normal shell for now and oil is still in very good condition considering its millage.
Thats not to say shell never gets contaminated but i trust shell and they make great fuels at reasonable prices.
Edited by OldSkoOL on 21/11/2007 at 10:53
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I had always used supermarket diesel because that is the only filling station in our town and I am lazy and a bit tight. My credit card company started a promotion on Shell where you get a discount so I thought "why not ?" ( It's only 5 minutes more to the Shell station ) Given that I drive averagely 1000 miles a week it had to be worth a try as the Shell with a discount was cheaper than supermarket. Unforeseen payoff is a significant increase in fuel economy with the branded diesel from 41mpg to 45mpg
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The only different fuel I've noticed is Esso diesel.
The lack of frothing when refuelling the Passat is remarkable.
Having said that, my local choice is Total or supermarket.
Distict lack of Shell in Chesterfield.
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Wishbone, consult the manual which is supplied with the vehicle and use fuel which conforms precisely to the specification given. You will then obtain the maximum benefit of the testing which you have helped to pay for. Note whether or not fuel additives are advised.
Specifications are useful for obtaining value for money. I buy the fuel which meets my vehicle's requirements at the lowest available price. Luckily, the market-leading supermarket in the UK supplies fuel to spec. and I have had no problems whatever over many vehicle miles.
659.
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I have a 2003 Yaris D4D.
Use Shell or BP or Texaco diesel.. or Tesco or Morrisons.
I have tried V Power.
I keep detailed fuel consumption figures for all. (57mpg overal with ac on... mainly town driving)
V Power made no difference in 900 miles to fuel consumption .. The engine MAY be slightly quieter but as I'm currently using Tesco.. I cannot tell.
Frankly I would not use VPower: it's an expensive gimmick with no apparent benefits.
All the others seem to be the same. I therefore buy only on one thing: PRICE.
All the rest is cow excrement.
madf
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My wife has a company Corolla D4D 1.4, she normally uses Texaco on her fuel card & the other week I filled it out of habit with V Power, as I use it in all my cars apart from the 7.
When I spoke to her a day later she asked me what I'd done to it as it was so much quicker & felt smoother!
In the right car it's not an expensive gimmick, in some cars it makes no difference in others it does. The Porsche has no knock management but definitely runs better on V Power & most of my members say the same.
Would I use supermarket fuel? No A. Shell is cheaper in most of Kent & B. after the previous fiasco certainly not.
Jim
54 Jaguar S-Type 2.7 SE Diesel
87 Porsche 944 Lux 2.5
80 TR7V8
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Hi tr7v8 - Strangely similar experience with a totally different category of car. My wife has a wee Ka. She normally puts local supermarket petrol in it. I borrowed it the other day for some reason and filled it up ( mistakenly ) with the Shell "posh" stuff, V-power or something. Wife mentioned the following day that since I had driven her car it felt smoother and more responsive. I smugly suggested that it was how it had been driven which had perked it up but privately suspect the "single malt" fuel must have made the real difference ! You have to clutch at every straw when your wife has an advanced driving qualification and you don't y'see !
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It's important not to mix up petrol and diesel engines in this discussion. In a petrol engine the fuel has to burn in a controlled manner at a rate which is - at least to some extent - matched to the piston position. Detail fuel specification is therefore important.
The diesel has no such restriction unless gross detonation occurs due either to mistiming or a fuel cetane rating which is too low (fuel of this type is not generally available in the UK).
Other than its superior efficiency at part load, the genius of Rudolph's design is its tolerance to fuel variations. Without writing a treatise on multi-fuel usage, if you can get the right amount of fuel in there at the right time the engine will go. If the cetane rating is sufficient it won't detonate (diesel detonation is a bit different from "pinking" and you wouldn't want to go there). Finally, if the fuel is atomised such that the droplet size is below a defined minimum (see Bosch Automotive Handbook) the engine will give low smoke and a high specific output due to more complete fuel combustion.
High pressures are required to achieve this degree of atomisation in the injection period available, which is why unit injector (PD in VAG speak) systems score so well in terms of engine specific fuel consumption (SFC). Many commercial and larger diesels use unit injectors to provide the necessary fuel system durability coupled with the best possible SFC.
659.
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Diesel fuel is required to provide lubrication to various components in the fuel system, in this regard BP Ultimate and Shell V-Power (and equivalent) will be best followed by std Shell etc. Supermarket diesel is a false economy.
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Could you please say who carried out the testing and where the results are published?
659.
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To Quote Intertek:
"Low Sulphur Diesel and Lubricity Issues:
Hydroprocessing removes sulfur and significant amounts of polar and aromatic compounds that give conventional diesel fuel adequate lubricating capability. Low lubricity in diesel fuel can cause engine problems unless treated with additives. Measurement of diesel fuel lubricity characteristics is important in order to monitor lubricity additives and final fuel quality."
The premium diesels have the relvant additives and cetane boosters.
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The premium diesels have the relvant additives and cetane boosters.
And so do the supermarket brands, dont they? The BS EN 590 Standard for diesel fuel looks like it includes a test method for lubricity, BS ISO 12156-1.
When ULSD was first introduced in Sweden in 1991 there were widespread injection pump failures due to lack of lubricity, which was corrected with additives. I dont think the supermarkets would wilfully risk getting sued by every man and his dog for injection pump failures.
I'm inclined to believe the AA's take on supermarket fuel, an organisation who are not trying to sell the stuff. "Think of supermarket fuel as the standard product and the premium fuels as a premium product at a premium price":
snipurl.com/1u1ey
Edited by Rich 9-3 on 22/11/2007 at 12:39
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Would definately reccommend you give BP Ultimate a try. I've had a Corsa 1.3 CDTI (Fiat engine) for nearly four years and from day one was never happy with the starting and running after my previous (Isuzu) engined ones. The dealer reckoned nothing was wrong and I sort of got used to it. I then filled up with Ultimate and it felt better almost straight away. Like the the poster above I got asked by other half what I had done to improve the car. I think some of the newer engines must respond to "better" fuel whilst for something like an older pug workhorse or similar it would probably be money wasted. No Esso or Shell nearby so I haven't tried them, when not near BP I uaually fill with Texaco. I record my MPG and can't see any real improvement on Ultimate, only to the running.
Steve.
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I've got a Toyota Auris 2.0l turbo-diesel and I've used BP Ultimate on the rare occasion when I can find a fuel station which sells the stuff. It makes a huge difference in the engine noise and the fuel economy also improves.
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Try a double blind test. Get someone else to fill your cars but not tell you the brand, different every time including some supermarket fuel.
I used to work with someone who made a fuss about wanting "teapot tea" as teabag in the cup was "disgusting", quite a performance when it was your round, as it were.
One day we made 5 cups of tea *without him seeing*, teapot and teabag in the cup. Yup, not only couldn`t tell the difference, but chose the wrong (teabag) cup.
IMHO, However unlikely it may seem, Psychological factors have to be excluded by a double blind test. The same applies to fuel additives.
Regards
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