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[Tony H]

http://www.thorneymotorsport.co.uk/gcs_article.php?artid=64&typelink=http%3A%2F%2Fwww.thorneymotorsport.co.uk%2Fgcs_article.php%3Ftype%3DNews%26subtitle%3D0%26title%3D0%26text%3D0%26toc%3D1 Link                                              
40 BHP or over 10% increase to a M3 csl when tested using 99 RON petrol   8-)                                                              

[Del Boy]

http://www.thorneymotorsport.co.uk/gcs_article.php?artid=64&typelink=http%3A%2F%2Fwww.thorneymotorsport.co.uk%2Fgcs_article.php%3Ftype%3DNews%26subtitle%3D0%26title%3D0%26text%3D0%26toc%3D1 Link                                              
40 BHP or over 10% increase to a M3 csl when tested using 99 RON petrol   8-)                                                              

I'm gonna start using 99 again

[STMO123]

Been using shell optimax for a while now. I thought I had more power but told myself I was imagining it. I should listen to myself more often

[MikeDundee]

I am going to go the extra mile now to Tescos garage

[Chopsdad]

I run BP Ultimate for a treat - or when dragging my caravan and do notice gains in power and torque but i'll try Tesco if it's good enough for a CSL.  Will the higher burn not damage valve seats - don't know what that means but my dad always mentions it with high octane fuels.  :-/

[JamesV6CDX]

I didn't notice any difference when using it in my V6 - but i DID notice a BIG drop in MPG compared to usual 95 ron.

[MikeDundee]

Yeah BP Utimate  now and again, closer than tescos, but long term damage ?

[Marks DTM Calib]

Very unlikely to damage the valves and seats....the head cooling on the V6 is pretty good and modern valve seats are as hard as nails.

I suspect the 2.5 and 3.0 V6 will like the high octane fuel as they are pretty high compression....so could run more spark advance before pinking occurs. Note that it is likely to take time for the ECU to adjust the spark map.

[bob.dent]

I run BP Ultimate for a treat - or when dragging my caravan and do notice gains in power and torque but i'll try Tesco if it's good enough for a CSL.  Will the higher burn not damage valve seats - don't know what that means but my dad always mentions it with high octane fuels.  :-/

I've been using this all the time for last few months - definitely seems to perform better than on the cheaper supermarket fuels. Very slight improvement on fuel economy too, but only a couple of mpg.

[nixoro]

I didn't notice any difference when using it in my V6 - but i DID notice a BIG drop in MPG compared to usual 95 ron.

Perhaps you have a similar problem to me, a heavy right foot always hitting the go pedal

[Martin_1962]

I don't go below 97RON I think the car could easily have a higher CR to cope

[Salty]

Always used to run the Volvo on optimax, only started putting it the Meega recently.

[hotel21]

It certainly makes a difference to mine.  Car is more responsive on Opti or Vmax etc.  

[Salty]

It certainly makes a difference to mine.  Car is more responsive on Opti or Vmax etc.  

It made a difference with the volvo as well. I intend to keep putting it in now  I've started

[hotel21]

Also tried it in the wifes 1.4 206.  No difference to speak of.  

The FJ1200 likes it though, for some reason!