98 octane gas in France: Any benefit?

[Parisianviper]

Hello everybody,
This is a question for the tuning specialist.
Since our Premium Unleaded is 98 in France, is there any consequences in the way the car should be tuned, or any benefits compared to 91 or 93 octane Gas?
Sorry if it is a stupid question .

 

[GTSnake]

Bonjour mon ami
If you have 98 octane you can run more boost without le detonation.

 

[Parisianviper]

More boost with a surpercharger?

 

[luc]

Salut Eric:

Tu ne peux pas comparer l'octane francais a celui des USA.

There are 2 ways to grade gasoline, one is RON (Research Octane Number) and the other one is MON (Motor Octane Number)

MON is usually 8 to 10 points lower than RON.

In the USA the rating is (R+M)2 and in Europe it's only RON, the net result being that due to the difference in octane rating calculation, the same gas is 4 to 5 points lower in the US compared to the same gas in Europe.

So a 98 gas in Europe would be a 93/94 in the US.

Luc. 00GTS

 

[Parisianviper]

Thank you Luc for that clear explanation.
That sounded too good to be true.

 

[joe117]

But even if it was 5 points higher than our high test 93, there wouldn't be much you could do to take advantage of that in a stock Viper.

Vipers have no knock sensor and I believe you would need some kind of tuner box to change the timing.