America's #1 Ethanol Treatment. Full fuel system cleaner, corrosion inhibitor, and water remover — designed for use at every fill-up. PEA cleaners strip carbon buildup, maximize fuel economy, and keep every gasoline engine running cleaner, smoother, and stronger all season long.
Modern gasoline isn't what it used to be. Today's ethanol-blended fuels — even standard E10 found at most pumps — attract moisture, accelerate corrosion inside fuel systems, and leave behind gum and varnish deposits that rob engines of power and efficiency over time. STA-BIL In-Season Protection (part 22264) was formulated specifically to counter those effects at every fill-up, functioning as ongoing preventative maintenance rather than a one-time fix.
The formula combines the strongest PEA (polyetheramine) fuel system cleaners available with industry-leading corrosion inhibitors and water removers. Together, they strip away carbon deposits from injectors, carburetors, and intake valves; prevent corrosion caused by ethanol-blended fuels; displace moisture before it can cause damage; and keep fuel fresh for up to a year. The result is an engine that starts easier, runs smoother, produces more power, and uses fuel more efficiently — from your daily driver to your RV generator to your lawn equipment.
A single 10 oz bottle of STA-BIL 22264 treats up to 50 gallons of fuel at the standard 1 oz per 5 gallon treat rate, making it one of the most cost-effective ways to protect any gasoline engine in your fleet.
Industry-leading corrosion inhibitors create a protective barrier on metal fuel system surfaces, preventing the moisture absorption and oxidation that ethanol-blended fuels accelerate
The strongest class of fuel system cleaner strips carbon deposits, gum, and varnish from injectors, carburetors, and intake valves — restoring power and efficiency lost to buildup
Actively displaces moisture and water from the fuel system before it can cause corrosion or phase separation in ethanol-blended fuels
Stabilizes fuel against oxidation and degradation — keeps gasoline fresh in vehicles, gas cans, and equipment for up to 12 months when added to fresh fuel
Treat Rate: 1 oz (30 mL) per 5 gallons (19 L) of fuel One 10 oz bottle treats up to 50 gallons total For Vehicles (cars, trucks, motorcycles, ATVs): Pour the correct amount directly into the fuel tank before adding fresh fuel at the pump. Adding before fueling ensures thorough mixing as fuel fills the tank. For Outdoor Power Equipment (mowers, generators, trimmers, chainsaws): Pour the correct amount into your gasoline container first, then pour the treated fuel into the equipment's fuel tank. This ensures even distribution before fuel reaches the engine. After Adding: Run the engine for at least 5 minutes to allow the treated fuel to circulate through the full fuel system — injectors, carburetor, fuel lines, and intake valves. Frequency: For maximum protection, use at every fill-up throughout the season. For occasional-use or stored equipment, one treatment when adding fresh fuel will stabilize it for up to 12 months. Over-Dosage: Not harmful. Do not exceed 4× the recommended amount. If more than 4× has been added, dilute the fuel mixture.
Not all fuel additives are equal. STA-BIL In-Season Protection uses PEA (polyetheramine) cleaners — the most effective class of fuel system detergent available and the same technology used in premium fuel formulations. PEA cleaners work by chemically bonding to and dissolving carbon deposits, gum, and varnish on contact — including hardened deposits that weaker detergents leave behind. They clean injector spray patterns for better fuel atomization, free stuck carburetor passages for consistent fuel metering, and remove intake valve deposits that disrupt airflow and combustion efficiency. The result isn't just a cleaner engine — it's a measurable improvement in power output, throttle response, idle smoothness, and fuel economy. Regular use prevents deposit accumulation before it starts, keeping engines performing like new rather than requiring periodic restoration treatments.
Vehicles & Recreational: • Cars, trucks, SUVs • Classic / collector vehicles • Motorcycles & scooters • ATVs & UTVs • RVs & motorhomes Outdoor Power Equipment: • Lawn mowers (push & riding) • String trimmers & edgers • Chainsaws • Snowblowers • Pressure washers • Generators All Gasoline Types: • Ethanol-free fuel • E10 (regular pump gas) • E15, E30, E85 • 2-cycle premix fuel For Marine engines, use STA-BIL 360° Marine instead.
STA-BIL 22264 In-Season Protection is designed as an everyday, in-season treatment — it provides continuous fuel system cleaning and corrosion protection with regular use, and will stabilize fuel for up to 12 months. For long-term storage beyond one year, use STA-BIL Storage (Red) instead, which is specifically formulated for extended fuel preservation. The two products complement each other: use In-Season Protection throughout the active season, then switch to STA-BIL Storage when winterizing or putting equipment away for an extended period.
For complete year-round protection: use STA-BIL In-Season Protection (22264) throughout the active season at every fill-up, then treat with STA-BIL Storage before putting equipment away for an extended period.
Manufacturer: Gold Eagle Co. — family-owned for over 90 years; 4400 S. Kildare Ave., Chicago, IL 60632 Product Support: 800-367-3245 (toll-free) Additional Sizes: • 10 oz — SKU 22264 (this product) • 32 oz — SKU 22275 • 8 oz Small Engine — SKU 22288 California Residents: WARNING — Cancer and Reproductive Harm. See P65Warnings.ca.gov for details. Warranty: 30-Day Replacement If Defective. Claims are effective when used as directed. Performance verified through third-party, non-biased laboratory testing.