I looked through this subforum and there don't seem to be any threads about these.

Several people have told me that Australian petrols don't actually attain the advertised RON - for example, that 98RON is actually around 96, etc.

Having recently had an engine failure in my 118TSI, at least partly due to predetonation, I'm very interested in the subject of octane numbers. I now have new pistons, rings, and injectors - and I want them to last.

I visited a local auto parts store, and saw that there were octane boosting additives from Nulon and Wynn's, which promised an improvement of between 2 and 8 octane units.

My question is - is there any risk or downside to these fuel additives? Could they damage my engine or void my warranty? And - do they actually work?

I would love to get opinions from people who have knowledge about this.