New fuel from Shell

[Peter255]

It certainly depends on the car. Funny thing is IIRC certain "clever" new engines can take advantage of the extra octane, but extremely high performance cars (specifically M series BMWs etc) do not as they are specifically tuned for optimum performance on 97ron. I guess there is less room for adjustment in an engine tuned to that degree.

There was an excellent article on it in one of the big car mags a while back. I can't remember which one tho. :? They tested power on a range or cars and also consistency of the power. They did dyno runs taking fuel from different stations, and at different times from the same station.

Thanks
Peter

 

[® Andy]

Yep ... it was in evo.

They reckoned the M5 was so clever that it managed power output to the expected level even when you put in "more powerful" fuels.

On the turbo'd car they tested (can't remember what it was) the power difference between different fuels was significant tho'!

 

[Peter255]

Yep ... it was in evo.

They reckoned the M5 was so clever that it managed power output to the expected level even when you put in "more powerful" fuels.

On the turbo'd car they tested (can't remember what it was) the power difference between different fuels was significant tho'!

IIRC it was a new golf GTI.

Peter

 

[jamie g]

On the turbo'd car they tested (can't remember what it was) the power difference between different fuels was significant tho'!

I don't think you can put the power difference(Loss not gain) down to the fuel they used. The heat is more likely to have caused the power loss.

 

[® Andy]

On the turbo'd car they tested (can't remember what it was) the power difference between different fuels was significant tho'!

I don't think you can put the power difference(Loss not gain) down to the fuel they used. The heat is more likely to have caused the power loss.

The test was carried out as scientifically as possible with the sole aim being to work out the effect of different petrols. Hence they normalized things like that that could have effected the results.

 

[Peter255]

On the turbo'd car they tested (can't remember what it was) the power difference between different fuels was significant tho'!

I don't think you can put the power difference(Loss not gain) down to the fuel they used. The heat is more likely to have caused the power loss.

It was power GAINs on the turbo car. Some supposedly high octane fuels were better than others but in general they did show gains.

Peter

 

[jamie g]

The engine management will sense knock for sure (on a turbo charged engine) with low octane fuel under rolling road conditions. It will retard the ignition amongst other measures in an effort to stop the knock. The same test with higher octanes will possibly allow the engine to run with the preset optimised conditions allowing normal power figures to be reached.
The same results under road conditions are unlikely to be found on a near standard car.
But hey, draw your own conclusions.

 

[Anonymous]

Interesting link on pistonheads about 95 and 99 ron.

link

 

[Andy luvs V6s]

my tesco only does 95 and 97 ron

 

[Peter255]

my tesco only does 95 and 97 ron

But you don't drive quite yet.

Plenty of time for them to stock 150RON for you in a few years time. :wink:

Peter

 

[Andy luvs V6s]

that'll be about 5 quid a litre

 

[jamie g]

Nice link Takeshi Kitano, you've gotta love TMS for their "scientific research". Eight months to show their BMW m3 csl "stage 2 tuning pack" produces less power than a standard car. Or am I missing the point?
Typical misleading results, good read all the same.
Got anymore links like that?

 

[phillv6]

One of my mates runs a 172 cup and says he can feel an improvement using "V power".

Has anyone else noticed that the Vee runs a bit better using this :?: