It seems to me that the responses on this thread are a bit conservative.
My guess is that there are two major reasons for this:
- The bad rep of off-the-shelf additives, and the sketchy knowledge of how much they boost octane; and/or
- The concern that an owner will crank in a 100-octane tune, forget that they need 100-octane fuel, and cause damage
Both valid, to be sure. It's difficult to find, even on the vastness of the web, definitive data on the efficacy of store-bought boosters.
But there are well-known ways to protect against disaster:
1. Mix your own. See
here and
here for a discussion of this topic. I plan to try this, at least as an experiment.
2. Pay attention & run logs. Seems to me, if you don't hear detonation and the ECU isn't pulling timing, then the engine likes the fuel/tune combo that it's experiencing.
3. Run W/M. Also a well-known methodology.
Having said all that, I seriously doubt that I'll do this additive stuff on a regular basis. Too costly, to much a hassle, and always a possibility that I'll forget the additive.
Am I missing something?
Bob