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Discussion Starter · #1 ·
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Good morning, just a quick post to let you know about different
petrol that I have tried - Tesco Momentum.



After reading the reviews and test results here;http://www.tesco.com/Momentum99

I set off to my nearest Tesco filling station in Newcastle, the Rio has a 40 litre tank so must have had
about 5 litre left in
as I only managed to get 35
Litres in to it which cost me £48 @ £1.399 per Litre.

Results so far from my experience; since Friday I have covered 115 miles and
the fuel gauge
has only just moved down one notch i.e. one division of the fuel gauge.
Therefore, I can appreciate this scale is non-linear so I can expect around 460
miles for a full tank, which going by my previous consumption is excellent.

On standard unleaded I filled the car with 70 litres over two weeks, which gave me a range of 520 miles in
total, so that's 300 miles on a full tank, however this seems flawed somewhat -
an increase of 160 miles on the same measure of fuel for only 6p per litre more?



Somebody please point out where I have went wrong in my calculations, same
miles covered, and same route everyday.



Best Regards



Rob.
 

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The RIO gauge aint accurate. On my diesel Rio the gauge took about 100 miles to move off the full mark then after that it developed a gallop. The only way to work out mpg accurately is to brim it each time and note the miles covered. Though I achieve 58mpg in a rum upto Inverness at 70mph. Mixed driving I got 50mpg but I had a tuning box on mine to give extra power.
 

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yes a fuel light comes on when between 5 litres and 6 litres is left in the tank.

I tend to think of 3 coke bottles left.
Still a bit of fuel in there so no need to dive into the nearest petrol station.
 

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Now were talking momentum 99 I luv the stuff 99octane
I found its amazing petrol for getting good mpg but its bio petrol ? what is bio petrol ? My car has to be run on 97 Ron or more so that's reason I use it , and cheap too
 

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Dano said:
Now were talking momentum 99 I luv the stuff 99octane
I found its amazing petrol for getting good mpg but its bio petrol ? what is bio petrol ? My car has to be run on 97 Ron or more so that's reason I use it , and cheap too
Well you know that stuff called Baby Bio that you put in water and it makes your plants grow more well Bio petrol makes your car go more

Edited by: davy
 

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Blends of biodiesel and conventional hydrocarbon-based diesel are
products most commonly distributed for use in the retail diesel fuel
marketplace. Much of the world uses a system known as the "B" factor to
state the amount of biodiesel in any fuel mix:<sup id="cite_ref-1" ="reference">[2]</sup>
<ul>[*]100% biodiesel is referred to as B100, while[*]20% biodiesel, 80% petrodiesel is labeled B20[*]5% biodiesel, 95% petrodiesel is labeled B5[*]2% biodiesel, 98% petrodiesel is labeled B2[/list]


Blends of less than 20% biodiesel can be used in diesel equipment with no, or only minor modifications,<sup id="cite_ref-2" ="reference">[3]</sup>
although certain manufacturers do not extend warranty coverage if
equipment is damaged by these blends. The B6 to B20 blends are covered
by the ASTM D7467 specification.<sup id="cite_ref-3" ="reference">[4]</sup>
Biodiesel can also be used in its pure form (B100), but may require
certain engine modifications to avoid maintenance and performance
problems<sup ="Template-Fact" title=" claim needs references to reliable sources from August 2010" style="white-space:nowrap;">[citation needed]</sup>. Blending B100 with petroleum diesel may be accomplished by:
<ul>[*]Mixing in tanks at manufacturing point prior to delivery to tanker truck[*]Splash mixing in the tanker truck (adding specific percentages of biodiesel and petroleum diesel)[*]In-line mixing, two components arrive at tanker truck simultaneously.[*]Metered pump mixing, petroleum diesel and biodiesel meters are set
to X total volume, transfer pump pulls from two points and mix is
complete on leaving pump.[/list]Bio-petrol is a mixture of petrol and ethanol. It is more expensive to covert a petrol car
to run on ethanol than it is to convert diesel to run on bio-diesel but
it is still a useful, if somewhat developing technology. Most cars will
require an adaptation to run on bio-ethanol if the concentration of
ethanol exceeds 10%. Most cars can run on what is known as E10. There a very few cars available on the market at the moment that will run on higher concentrations such as E85 (85% ethanol). Again, there are environmental drawbacks with increased demand for crops.
 

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Discussion Starter · #11 ·
Quick update.....
Done just over 196 miles and the fuel gauge is about 1 notch past the half-way mark, looking good so far.
 

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On the diesel the tank is 45 litres, isn't the petrol the same?

I would be careful with the fuel low warning light. Remember you will never be able to empty the tank fully, there'll aways be a bit left you can't get out and you probably wouldn't want to as it will contain all the crud that falls to the bottom of the tank.In my experience, when the light comes on, I've got about 2 to 3 litres of usuable fuel left. I would not want to push it beyond 20 milesonce the light appears, less for the petrol version.
You can only use the gauge as a rough guide. It's not linear and, if it says half, you've probably got less than half a tank left.
Filling the Rio is a pain as the cut off point is never clear. It aways seems you can get a bit more in after the pump has cut out. This makes it hard to do brim to brim mpg tests. Especially as if you overfill, some will spill out the overflow when you go round bends. So make sure you do several tank fulls to get a proper indication and take the average.
 

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Discussion Starter · #13 ·
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Hiya, well results not as good as anticipated :-/

I am getting just less than 300 miles on a full tank, so having calculated my
MPG it comes out at around 36.4 MPG, which does not seem right for such a small
engine.

Maybe it is the physical size of the car that eats the fuel, maybe it is my
driving style however I have adopted a much more 'eco' driving style in the
last few weeks i.e. not allowing the rev's to go above 2500 RMP during a gear
shift, keeping the car in the highest possible gear without laboring the
engine, taking more time to reach the speed limit rather than flooring it etc
but in my mind I should be getting better range that this.

My previous car was a Renault Clio Sport 16V 1.2, I could get 320 mile out of a
full tank and yet I used to drive it allot harder than the Rio.

So, maybe I need to do some further investigation here; Check my tyre pressure,
have a garage check the engine over maybe but something aint right. It is
costing me £48 per week and this is too much, guys at work who have bigger
cars, bigger engines don't spend this much and yet do more miles, either I am
doing something wrong in my driving style or there is something wrong with the
car.

Shame really as I was really confident the premium fuel would make a massive
impact.
 

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Check you haven't got a dragging brake and wheel alignment along with the tyre pressure check. Change the air filter too. You should be able to push it up a bit, but don't expect to get much over 40 mpg.
 

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Just a tip that I found with the Diesel Rio.

Changing up a gear below 2,500 rpm could end up using more fuel as you would be off turbo boost (below 1,600rpm) in the next gear.

Also tyre pressure and outside temperature seem to overrule any driving style when it comes to fuel economy.

One day I drove the Rio when it was -15c outside and it used nearly a quater of a tank just to do 18 miles !
Yet when in the height of summer the fuel gauge will hardly move to do the same trip.
 

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Discussion Starter · #17 ·
Cheers for the info Diddy, however I drive a petrol Rio.
Going to book the car in to Croxdales to have the Tracking and Balancing done, checked the air filter and it seems fine, will take it out anyway and give it a blow out with the compressor at work but it is not that dirty.

Rob.
 

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Discussion Starter · #18 ·
Ok, last two tanks I have ditched the Momentum 99 and used Shell V-Power; 100% better!
Less knocking, pulls better in 3rd up hills and MPG went from 36 to 41.5.
So the moral of the test ...... use decent petrol ;-)
 

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Anyone on here tried super diesel? Do you get improved mpg as they claim and does the extra expense justify using it? Just wondering...
 

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I tried BP's super diesel (can't remember the name) but it was exactly the same in terms of performance and fuel economy.

I also tried the same fuel on the wifes Astra 2.0l DTI engine and it went a lot better with this fuel.
But that is an older diesel without common rail injection.
 
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