an octane, right? If a bottle of octane booster states that it will raise octane by three points for every 5 gallons, that means it will give you .3 octane(97.3 5gal, 97.15 10gal). If you wanted to make your 97 octane into 100, you would have to pour in 3.3 bottles of octane boost to raise one octane for every 5 gallons of 97. That's 10 bottles of octane boost for just 5 gallons of gas to raise 3 octanes, and you would need 20 bottles for 10 gallons. Not worth it, especially when those bottles range from $2- $12 for a bottle. You should look for a station with higher octanes off base.
