The 1-gallon diesel fuel stabilizer contains 128 US fl oz. Calculated package capacity is up to 1,280 US gallons in-season or 640 US gallons for storage, using the respective manufacturer rates. Diesel fuel care requires a product selected for the fuel and operating pattern. This 1-gallon 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 1-gallon bottle lets you compare purchase quantity with the separately listed 32 oz 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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Shipping & Returns
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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 for winterizing backup generator fuel
Bought the 1-gallon jug (MPN 22255) to treat our commercial backup diesel generator fuel supply. Mariners Warehouse shipped it quickly and safely packaged. Keeps the diesel fresh for months without any gelling or sludge formation. Highly dependable product.
Great value in the gallon size
We manage a small fleet of farm tractors and trucks. Using this at every fill-up has completely stopped injector clogging issues. Compared to other marine and automotive parts suppliers online, Mariners Warehouse had a great price on the gallon size. Will buy again.
Keeps marine diesel moisture-free
Inboard marine diesel engines are prone to condensation and water accumulation during storage seasons. I swear by STA-BIL diesel formula. Put this in our twin-diesel boat before putting it up for the off-season. Fired right up on the first crank this spring. Top-tier service from the store too.
Solid stabilizer, lasts a long time
The 1-gallon container treats a massive amount of fuel (around 1,280 gallons at the regular ratio), which makes it cost-effective for heavy equipment owners. Noticed smoother idle and cleaner emissions on our heavy machinery. Shipping took an extra day, but overall very satisfied.
Saved our stored fuel from oxidation
Stored our tractor diesel for over 10 months in external storage drums. Thanks to this formula, there was zero dark oxidation or sediment buildup. The fuel looked and burned clean. Excellent product representation and fast fulfillment from Mariners Warehouse.
Frequently Asked Questions
Is this formula for diesel or gasoline?
This is the diesel-specific formula, MPN 22255. 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 gallon package treat?
The calculated capacity is up to 1,280 US gallons in-season or 640 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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