Octan booster, Is it dangerous? Options

[Phr0z3n664]

I went and picked up some octane booster/fuel cleaner kit. I ran it w/ regular gas I noticed a slight difference in performance, it didn't hesitate throughout the gears, and got up to 60 slightly a bit quicker.

But my question is could this be harmful to my engine If I kept using it? my engine has 96,000 miles on it, and was only going to plan to use after every oil change.

So should I continue to use it or not?

[GeEkBoY]

The best way to boost octane is with ethanol, octane rating of 106 (I think, E-85 is 105). Most other octane boosters are nasty compounds, ethanol is safer than gasoline. Only issue is with high levels of ethanol is some vehicles have chemical problems with certain rubber coupmounds in the fuel lines and injectors. Manufacturers allow up to 10% with no issues, so you could push it a little past that.

if you add 10% ethanol to 87 octane fuel, you would get 87*.9+106*.1 = 88.9

if you add 20% ethanol to 87 octane fuel, you would get 87*.8+106*.2 = 90.8

If you want to make it yourself, check here:
http://running_on_alcohol.tripod.com/