Hi Roy & Anders
The theme is very interesting - specially for us in Denmark, where 98 with MTB is almost banned !
I have tried earlier with 95 (by mistake of course

) - and it was no good experience with the pinking.
It was very clear to hear even with small accelerations. Pushing the acceleration was not an option.
But since the thread was startet, I have now tried the shell V-power which is 97 octane.
It seems to work, however I will adjust the timing a little - maybe 1-2 degrees or less.
I don't think the octane booster is an option, the price for a small bottle is ~12-13 EUR - and one bottle pr tank - no, crazy.......
Another thing I have found interesting is the approval of unleaded fuel from Peugeot.
Since a lot of us matra-freaks uses additives....... - but it is not needed.
Anders, I will find Bagsværd one day, when I have the Murena on the road again
BR
Henrik