The 32 oz diesel treatment provides different total capacities by use: up to 320 US gallons in-season, or 160 US gallons at the storage rate. Diesel fuel care requires a product selected for the fuel and operating pattern. This 32 oz diesel fuel stabilizer is intended for documented tasks including limiting sludge and sediment formation and supporting injector cleaning and lubrication. It is separate from gasoline Storage and Marine formulas.
Dose selection depends on whether the diesel is in regular use or being treated for storage. The manufacturer publishes different rates for those two tasks. Plan the fuel quantity first, then measure the additive instead of treating the container’s maximum in-season capacity as the correct dose for every situation.
For boats, generators or other diesel equipment, follow the engine manufacturer’s fuel and service requirements. Additive treatment does not replace inspection, separator servicing or removal of contamination where service is required. Do not describe this product as a biocide or assume it provides an unverified anti-gel temperature rating.
The 32 oz bottle lets you compare purchase quantity with the separately listed gallon package. Choose based on current prices, the amount of diesel to be treated and the intended in-season or storage task. Retain a record of the measured dose and follow the supplied label’s handling and storage instructions.
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
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FUEL & ENGINE CARE GUIDE
Plan the Correct Diesel Fuel Stabilizer & Performance Improver Task
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Choose the Use Pattern
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Measure the Fuel
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Apply the Correct Rate
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Avoid Overtreatment
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Maintain the Fuel System
Compare the Formula, Package and Maintenance Task
Fuel Treatment & Engine Care Selection Guides
What Customers Say
Essential diesel stabilizer for long-term fuel storage
Added this 32oz STA-BIL Diesel Formula (MPN 22254) to my boat's diesel tanks before winter layup. It stops thermal breakdown, prevents sludge formation, and keeps ULSD fuel fresh for up to 12 months. Fired up cleanly on the first turn in the spring.
Cleans diesel injectors and cleans up engine idle
Noticed a smoother, quieter idle and less exhaust smoke from my marine diesel engine after using this additive. It lubricates high-pressure fuel pumps and keeps injectors free from carbon deposits.
Fast delivery and secure packaging from Mariner's Warehouse
Ordered from Mariner's Warehouse and the 32oz bottle arrived quickly with a tight seal and no leaks. Great price for a top-quality diesel fuel treatment.
Easy measuring bottle and great treat ratio
The squeeze dispenser top makes measuring exact ounces per gallon super straightforward. Treats up to 320 gallons of diesel fuel, making it very economical for larger vessel fuel tanks.
Protects against moisture and fuel system corrosion
Demulsifies water to help fuel water separators isolate condensation efficiently. Gives complete confidence against rust and corrosion inside expensive diesel injection systems.
Restores performance and improves fuel economy
Used this in both my marine diesel generator and main engine. Noticed improved fuel economy and throttle responsiveness on long cruises.
Reliable fuel treatment for all diesel engines
Highly effective anti-sludge and fuel preservation formula. A mandatory additive for any marine diesel tank to prevent filter clogging and fuel degradation.
Frequently Asked Questions
Is this formula for diesel or gasoline?
This is the diesel-specific formula, MPN 22254. Choose a gasoline product for gasoline treatment.
What is the in-season dose?
The manufacturer specifies 1 US fl oz per 10 US gallons of diesel fuel.
What is the storage dose?
The manufacturer specifies 1 US fl oz per 5 US gallons of diesel fuel for storage.
How much fuel can a 32 oz bottle treat?
The calculated capacity is up to 320 US gallons in-season or 160 US gallons at the storage rate. These are total-package capacities, not a single-tank instruction.
Can I use the gasoline stabilizer dose?
No. Use the diesel product’s own directions and intended-use rate.
Is it a confirmed anti-gel treatment?
No anti-gel temperature rating is claimed for this listing. Select a product explicitly documented for that task if needed.
Does it replace separator maintenance?
No. Continue fuel-system maintenance and contamination checks required by the equipment.
May I add extra product without measuring?
No. The manufacturer directs users not to overtreat. Measure according to the label.
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