Add entire bottle to nearly empty gasoline tank, then fill tank with up to 21 gallons of gasoline. For best results, do not refill tank until near empty. Repeat every 3,000 miles. This product contains no alcohol and will not harm catalytic converters or oxygen sensors. Can be used with all unleaded, oxygenated and reformulated gasolines. Safe to use with other Gumout fuel additives.
Always refer to the actual package for the most accurate information