Originally Posted by LukasM
It does indeed not have a knock sensor. There was a couple on here recently that took two 800s down to South America and both engines blew up.
True ... but it was never established what was in that fuel ... could have been anything.
Its also worth remembering that you can get a remap to run on lower octane fuel if you think you need it.
I have found in Australia if you have a full tank of our regular unleaded which is 91 octane (not the same as the US) instead of 95 or better it will ping under some conditions. I have tried octane booster as an experiment and it seemed to work fine.
Still slack of BMW ... my XChallenge apparently has a sensor and will reportedly run on almost anything.