I have,
Generally I find that it doesnt give the same good running feeling that i get after running though a tank of bp 97 or vpower 99.

On those my car runs sweet as a peach

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Ex- Phase 3 China GTi-6 T-Reg

I've run both my 306s on 95RON and 97RON and have noticed little difference between the two, if any, in terms of running & performance. MPG was higher but then so was the cost, and MPG was always s**t if driving the car at any sort of brisk pace regardless of fuel.

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61k miles Ph.1 Diablo '6 Project Thread

Pretty much this. I don't feel that the small increase in MPG offsets the extra cost, and that's driving sensibly and getting good MPG.

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61k miles Ph.1 Diablo '6 Project Thread

Im pretty sure that hardbook says that 97 is preferable,
Where as everyother handbook ive seen has said optional.
Personally, my car feels a lot happier on 97+
Particularly at idle and midrange

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Ex- Phase 3 China GTi-6 T-Reg

Less carbon build up and what fills the 3% left over from the 97 ron?

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Pug fee`ver,

Pick a Bogey, buy a Pug.

Black 306 GTI 6 Standard, was 60k mileage, bargain!!

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Because it burns cleaner, more ignition that lower-grade fuel. Iv seen heads used with this fuel and they do look cleaner which makes the engine more efficient

At a guess the RON means the flammable side of the fuel, so 100 RON would mean a higher rating of flammability, quicker and cleaner.

________________________________________

Pug fee`ver,

Pick a Bogey, buy a Pug.

Black 306 GTI 6 Standard, was 60k mileage, bargain!!

Clicky: [url =http://www.306gti6.com]click here[/url] remove the space between [url & =

Read the American manual for your bike. I'm sure the US spec R6 was 87!

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Red Rallye - Rolling "restoration"

Wishbone Polybushes available

Cant read that tbh?

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Ex- Phase 3 China GTi-6 T-Reg

Exactly the opposite.

High RON fuels on a map for low RON fuel can actually result in slightly less power as it tends to have a slower flame front speed.

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- Bespoke rollcages/additions/adjustments. Half cages right up to complete custom spaceframes - MSA/FIA spec, CDS, ROPT, T45, etc - PM me
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Custom-made polybushes available - need an odd size or fitment? - anything from batch work to one-off pieces.

Used this yesterday on a 150 mile round trip, felt no different to the old V Power tbh

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Team Supercharged Gti-6™

RON is the octane number, which has to do with the length of the hydrocarbon chains. The higher the octane number, the more resistant to auto-ignition (knocking) the fuel is. The higher the octance number, the larger the hydrocarbon chain and the more time it takes to burn, hence the need for a knock sensor to take different RON fuels: the timing is advanced for higher octance fuels and retarded for lower octance fuels. The increase in MPG comes from each individual hydrocarbon chain being longer and as a result there is more energy to be released by combustion per litre of fuel (it has a higher specific energy).

The octance number does not, however, have anything to do with how cleanly the fuel burns. Things like shell's v-power probably do have more expensive and different additives though.

If they were the same price, or cheap to the point that the higher octance fuels were still very cheap despite being more expensive, I'd buy v-power and the like due to the better additives etc. There isn't any harm in using 95RON though.


Higher octance fuels are harder to ignite (they ignite at a higher temperature and pressure).

The reason that race cars can only run on race fuel is that they typically run higher compression ratios, and if you used normal road fuel it would auto-ignite and knock before TDC due to the higher pressures during the compression stroke.

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61k miles Ph.1 Diablo '6 Project Thread

97+ suits the nice high compression ratio of a 6 engine perfect then. Mine certainly idles better and pulls better mid range.

I can also report better MPG I use nothing other than v power or esso supreme.

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Team Nile 6
Team: 40.2 MPG
5 x a 306 owner!
currently abusing type r's in a town near you ™
I truely live for the 306 ®
Build date: 29th October 1997 Wednesday's car
midweek madness

Something must be working well then as using V power always one, makes the car a bit quicker and two i get more miles out of it. Must be the additives making the engine cleaner, so there is more than one reason to use it rather than the low grade stuff.

From what i remember we only used to get unleaded back in the 90's, not super ??

________________________________________

Pug fee`ver,

Pick a Bogey, buy a Pug.

Black 306 GTI 6 Standard, was 60k mileage, bargain!!

Clicky: [url =http://www.306gti6.com]click here[/url] remove the space between [url & =