Originally Posted by
M.alex
My ECM is tuned for 93 octane. Don't really feel like the hassle of re-tuning it and I suppose the combination of Shell 91, our elevation, and the knock sensors make it okay to get away with, but if I wanted the simplest way to boost the octane to 93 is there any harm in adding an octane booster like Boostane at fillup? The reviews seem okay, but are there any negatives, like over time it will clog fuel injectors, etc.? Not doing it for power, moreover peace of mind of not having to rely on the knock sensors to save the engine in the event of an issue.