Measured in-season gasoline treatment
Use the exact formula’s directions
Keep package quantity separate from dose
This listing is one 32 oz In-Season treatment bottle. Calculated total-package capacity is 160 US gallons at the current published rate. Fuel that is used throughout the season has different maintenance needs from equipment placed in extended storage. This in-season gasoline fuel treatment is positioned for regular fill-up use, supporting documented fuel-system cleaning and corrosion care when used as directed. Choose the formula by the operating pattern rather than treating every stabilizer as interchangeable.
Start with the actual amount of gasoline being treated. The published In-Season rate differs from the Marine and Storage formulas, so use the correct directions even when the containers look similar. Container capacity is a purchasing quantity, not an instruction to put an entire bottle into one tank.
Check the fuel and ethanol limits approved for your equipment before adding a treatment. An additive’s compatibility with a fuel blend does not change the engine manufacturer’s fuel restrictions. Continue filter changes, inspections and other required fuel-system maintenance.
Compare package quantity with the amount of fuel you expect to use over time. Keep remaining additive closed and stored according to its label. If hard starting, poor running or other symptoms persist, investigate the cause rather than relying on a fuel treatment as a guaranteed mechanical repair.
Clear Product Details
Review the 16 oz gel format, specifications and application directions.
Surface Guidance
Check fiberglass, gelcoat and finish suitability before use.
Product Support
Ask about your surface and stain type before ordering.
Shipping & Returns
Review shipping information and return conditions before purchase.
FUEL & ENGINE CARE GUIDE
Plan the Correct In-Season Gasoline Fuel Treatment Task
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Identify the Use Pattern
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Measure Fuel Quantity
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Use the Correct Rate
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Continue Maintenance
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Reclose and Record
Compare the Formula, Package and Maintenance Task
Fuel Treatment & Engine Care Selection Guides
What Customers Say
Excellent in-season fuel system treatment
Ordered the 32oz STA-BIL In-Season Protection and shipping was fast with secure packaging. Easy to measure and add at every fill-up. Cleans injectors, increases power and efficiency, and protects against ethanol and moisture on my boat and outdoor equipment. Reliable performance and good value in the larger bottle.
Noticeable improvement in engine performance
Bought the STA-BIL In-Season Protection 32oz and received prompt delivery. Use it regularly in my marine engines and notice smoother idle, better throttle response, and cleaner running. Protects against corrosion from ethanol fuels and keeps the system free of deposits. Excellent product and solid value.
Effective cleaner and protectant
The STA-BIL In-Season Protection works well to clean the fuel system and prevent corrosion on my outboard and small engines. Bottle arrived on time and is easy to apply at the correct dose. Four stars only because a measuring spout with clearer markings would help, but overall performance and value are good.
Best in-season treatment I’ve used
Purchased the 32oz STA-BIL In-Season Protection and shipping was quick and careful. Add it at every fill-up for continuous cleaning and protection against ethanol damage and moisture. Engines run stronger with improved fuel efficiency. Highly recommend this size for regular marine and outdoor equipment use.
Keeps engines running clean all season
Got the STA-BIL In-Season Protection 32oz bottle. Delivery was efficient and product arrived ready to use. Correct application at fill-ups cleans deposits, prevents corrosion, and maintains peak performance on my gasoline marine engines. Strong results and good value for continuous in-season protection.
Frequently Asked Questions
What is the treatment intended for?
It is positioned for regular in-season gasoline fuel-system care, used under the supplied directions.
What is the published dose for the 32 oz formula?
Current manufacturer directions specify 1 US fl oz per 5 US gallons of fuel.
How often is it recommended?
The manufacturer recommends use at every fill-up. Follow the supplied label.
Does package size change the dose?
No. The appropriate rate is determined by the formula and the fuel quantity being treated.
Can it authorize an unapproved ethanol blend?
No. Continue to follow the engine manufacturer’s gasoline and ethanol limits.
Is it a diesel additive?
No. Choose a diesel-specific treatment for diesel fuel.
Does it replace diagnosis of persistent symptoms?
No. A fuel treatment is not a guaranteed repair for mechanical or electrical problems.
Does it replace routine fuel-system maintenance?
No. Continue the equipment manufacturer’s required service and inspection tasks.
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