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Thread: Long Haul MPG.......

  1. #1
    spoons
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    Default Long Haul MPG.......

    For anyone that is interested

    From Walsall to Deep Herefordshire to Dumfries (thats in Scotland you know), plus a bit of side tracking/messing about..... A, B & C Roads... Motorways, traffic jams etc etc.....

    With a FULL Load of camping equipment, tents, two passengers AND roof rack with two full sized mountain bikes.....

    From a full tank of BP Ultimate Diesel I got 488 miles when the Petrol light came on...... with 30 miles left on the computer (estimated distance left)...

    Not bad from a tuned 1.9 CDTi

    Considering the weight (had to pump the rear tyres to 45 psi) and the wind resistance with the bikes on top.... I thought that was quite good...

  2. #2
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    Quote Originally Posted by spoons
    From a full tank of BP Ultimate Diesel I got 488 miles when the Petrol light came on
    Diesel fuel and then a Petrol Light.

  3. #3
    spoons
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    Quote Originally Posted by AJA
    Diesel fuel and then a Petrol Light.
    Jeeez, Good Point...... I should get that changed.....

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    Regular Member The Doc's Avatar
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    Ha Ha!!! Quality!! Best I got on mine was a remap and 502miles to a tank driving very moderately. With the odd 'Ill sort you out' manoevere

    The red light was flashing rather urgently as if to say "Are you ****ing mad?!?!"

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    Regular Member nutron's Avatar
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    I've tried two full tanks of BP ultimate now to give to a good trial and the result seems the same as every other time I've tried it...My walets empty and I'm feeling Robbed.

    To be honnest, I'm sure I'm getting less mpg and no more power... The first time I tried it I was expecting it to work so it's not like I've was trying it wanting to feel robbed. It just doesn't seem to do anything for mine?

  6. #6
    On a Sabbatical VauxVeteran's Avatar
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    NUT!! the problem with super boost fuels ia that petrol is petrol and additives are additives, I had a V6 Omega some time ago, and to stop it pinking we tried super unleaded, no point at all, maybe the ron value does something beneficial to the engine, but it does nothing for extra mpg, anyway back to the additives side of things, this is like Lager and Lime, as apposed to a straight Lager, Lager and Lime is 9/10ths of a pint and one tenth of lime, same thing with petrol containing additives, you infact aren't getting a gallon of petrol, so any mpg increase is swallowed by the volume factor.

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    Regular Member Spikey©'s Avatar
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    That's not entirely the story VV, with petrols in particular, the SULs have a higher RON rating, this means that they explode and burn more efficiently. The problem is people put them in standard motors that have not been set up to use them. With a remap such as that installed in mine, the ignition is advanced slightly which means i will see performance benefits from using a higher RON fuel. Currently I use Tesco 99RON (which was in the car when the remap was done) as standard, on the way home from Billing I had to use a few gallons of BP Ultimate which is only 97RON, the motor was decidedly rough at times acceleration was not as sharp. 99RON back in now and all is well again.

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    Regular Member G.O'Rilla's Avatar
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    Just a quickie - all the fuel sold in UK - even biodiesel - has to meet EN standards 590 and 228 for the bog standard stuff, wherever you buy it. Quite frankly a few PPM of additives is not going to give you performance/economy but it might clean your engine. Basically the only thing that will give you extra is extra cetane number for diesel and octane number for petrol. As per the above anyone who puts 99 in a car mapped for 95 is wasting their money.
    P.S. I'm in the oil business, part of which is testing fuels

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    Regular Member G.O'Rilla's Avatar
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    Addendum: Race fuels are heavy on toluene etc which gives more bang. Don't try it in a road car - you can't afford it.

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