which grade of fuel?

[S3mon]

Hi

I've had my Esprit shipped over to Canada from Europe and when I first got here I noticed that petrol is a little different grade. 

Over here we have RON 85-95 on average. Rarely finding 98 at one or two places.

 

What should I ideally be putting in my NA S3? I've been erring on the side of the highest RON but not sure if this is right or not. 

Any thoughts please?

[MPx]

Highest RON available is good but it will work OK on lower.  Your bigger problem is likely to be the Ethenol content which I think is at least 10% in the US (would Canada be the same?) rather than 0-5% in the UK (not sure about Europe).  Ethanol is basically bad for all sorts of bits - but there's much been written on the subject already so just do a search....

...or try this lot cos they've done a fair bit of work and testing on older cars

http://www.fbhvc.co.uk/legislation-and-fuels/fuel-information/

[molemot]

In France, essence ordinaire is 10% ethanol...but the higher octane stuff has none. Not a difficult choice, then....(!)

[Andyww]

22 hours ago, molemot said:

In France, essence ordinaire is 10% ethanol

Are you sure thats fuel not a cheap wine? :)

[molemot]

Hmmmm....perhaps I should conduct experiments next time I'm there....

[Escape]

On 31/10/2015 20:01:03, S3mon said:

Hi

I've had my Esprit shipped over to Canada from Europe and when I first got here I noticed that petrol is a little different grade. 

Over here we have RON 85-95 on average. Rarely finding 98 at one or two places.

 

What should I ideally be putting in my NA S3? I've been erring on the side of the highest RON but not sure if this is right or not. 

Any thoughts please?

Are you sure the labels refer to RON in Canada?

From Wiki: In most countries, including Australia, New Zealand and all of those in Europe, the "headline" octane rating shown on the pump is the RON, but in Canada, the United States, Brazil, and some other countries, the headline number is the average of the RON and the MON, called the Anti-Knock Index (AKI), and often written on pumps as (R+M)/2). It may also sometimes be called the Posted Octane Number (PON).