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Thread: Petrol Stations

  1. #1
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    Default Petrol Stations

    Do they all use the same supplier?

    I usually use Shell unleaded but my local is closed so i went to Esso. It's 4p a litre dearer than Shell but the car seems to run smoother and pull better.

    Might give their diesel a go on Friday

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    Ultimately they use the same supplier - Mother Earth. But they may refine / crack it slightly differently and will probably put different things into it before you get it.

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    Regular Member cwozzie's Avatar
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    is the octane different?

    and does it really affect it or is it the driver thinking that its different fuel so it feels differnet i used tescos 99 octane (super unleaded) in my old bm and it felt no different to the standard stuff???

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    I try my hardest to use either Shell or BP, but last night got caught short by lazyitis so had to use Total.

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    Quote Originally Posted by cwozzie View Post
    does it really affect it or is it the driver thinking that its different fuel so it feels differnet?
    Probably just me, but i just wondered!!!

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    Regular Member m8internet's Avatar
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    Fuel suppliers vary by region
    In most areas there is one supplier who supplies the raw fuel
    Each retailer then adds their own additive, otherwise known as the key, to that
    In Scotland almost all fuel is raw BP

    The only exceptions are specialist fuels which are piped between refineries

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    Quote Originally Posted by m8internet View Post
    Fuel suppliers vary by region
    In most areas there is one supplier who supplies the raw fuel
    Each retailer then adds their own additive, otherwise known as the key, to that
    In Scotland almost all fuel is raw BP

    The only exceptions are specialist fuels which are piped between refineries
    A little while ago i carried out an electirical inspection At GATX oil terminal and storage facility in Grays essex, Everyday i was there i would see major fuel companies and supermarkets tankers all using the same draw off points to fill their tankers.. They would pull up goto into the reception area to sort out the relevant paperwork, then drive under the gantrys, earth the lorry and enter data onto the terminals on the high level walkway which then filled up their tankers with the pre arranged amount of the specified fuels, these tanker drivers would then go straight to garage forecourts to deliver the fuel... I asked a few of the guys working there how come they all used the same draw off points and they said fuel is fuel boy...! Its only the likes of large companies that have their own fuel storage facilities and the specific blend fuels the likes Bp ultimate and Shell V power etc... theres another depot near bristol where the same happend when we were there ie.. tankers using the same draw off points and fuel from the same storage tanks.. These depots get fuel delivered by Oil tankers which is piped straight in from the riverside....
    From what ive seen whilst being on these sites the likes of Tesco, Asda, Sainsbury's, Morrisons, Q8, Gulf, Esso, Fina etc use the same fuel drawn from the same storage tanks.. So unless the tankers have the additvies in them before they fill up then all the fuel taken from these tanks is the same... and i wouldnt have thought the tankers come in with additives (if any) in them already.. As already said these drivers went straight to garage forecourts from the fuel depots... Unless Scotland is different of course?
    Last edited by Big-Pete; 12th November 2007 at 20:52.

  8. #8
    Regular Member G.O'Rilla's Avatar
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    All fuels sold in Europe have to meet EN590 (diesel) or EN 228 (Gasoline). What Big Pete says above is absolutely correct and I would go a little further.

    The basic pump fuels (standard diesel and gasoline) all just meet the above specs, since no oil company is going to "give away" on any quality at all - that's money down the drain for them and believe it or not, refining margins are really dismal. Therefore, in addition to the above I would say that the basic fuels are probably almost identical in composition since there are a very limited number of ways that standard fuel components can be blended to meet ignition quality (octane, cetane), sulphur, distillation curve etc., whilst being cost effective for the supplier. In others words, bog standard Shell is no different to bog standard Tesco.

    Come to think of it, the only way that you can for certain tell the difference between fuels is not by standard chemical analysis, but by sophisticated biological fuel marking, which we do in Africa, India, and parts of Asia. Watch it - some of your wine has the same markers in to help prevent fraud/substitution!

    The alleged "superfuels" are different because they exceed the spec and are supposed to provide better economy/performance. Some of the claims are very dubious and many people consider these fuels to be of no benefit at all except to the oil company and the tax man. Some people with tuned engines find a benefit with these fuels, but I personally remain convinced (after spending a fortune on BP Ultimate and carefully logging over 2000 miles) that they are a waste of money with my un-tuned engine. IfI had a high performance engine, I would think differently

    Hope that helps
    Last edited by G.O'Rilla; 12th November 2007 at 21:40.

  9. #9
    Regular Member m8internet's Avatar
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    The draw points for HGV are mostly identical
    The fuel is drawn
    However, what you will not have seen is the key being added
    A tanker typically has 6 compartments, each of between 5,000 and 7,000 litres
    The key is between 1/2 and 2 litres
    It is held in a small tank and is added during the filling process
    However, one retailer adds their own when the petrol gets to the filling station!

  10. #10
    Regular Member G.O'Rilla's Avatar
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    These additives can be measured in the ppm range - 0.02&#37 and are usually injected. They may change some of the characteristics such as foaming in diesel (Tescos problem!!) but none of them are going to affect the quality of the fuel which must be batch tested prior to loading into the road tankers. No company could afford the cost of testing each truck.

    Many components are added to the batch prior to loading, since you simply cannot guarantee adequate mixing without the proper equipment. A "key" will help the characteristics but will not alter the quality of the fuel.

    In tesco's problem earlier in the year it is understood that the additive pump/line was left open and the diesel additive got into the fuel loading rack for subsequent loads of gasoline using the same rack. The contaminated fuel subsequently passed all the tests for quality since the additive was in the ppm range and not a part of the spec. Took a lot of sophisticated Gas chromatograph/ICP testing to actually find out what it was that caused the problem.

    I would never buy fuel from the retailier that add his own after delivery. I've tried adding antistatic additive to ships tanks by hand and it don't mix. Even with pumps on recirc.

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