@John, will try, thanks - I normally buy branded only and the higher quality (E5 instead of E10), but never tried the 100 octane, as they are even much more expensive.
I also forgot code 133, which is currently the most often error thrown - but this seems to be connected to the sport exhaust system ("slow reaction"). Exhaust has no leaks, sensors have been replaced - similar errors reported by owner who has same exhaust. As long as it´s only a reset away, I´ll prefer the phenomenal sound over replacing any parts of the exhaust system :-)


2010 Roadster Sport 3.0 (S3) - black
1997 Mazda MX5 1.6 (NA) - red