Should I really use STA-BIL 360 Marine before every fill-up? Is it truly necessary?

To be blunt, yes, especially if you want to protect your investment. Boats live in a high-moisture environment. STA-BIL 360 Marine is engineered to protect your tank from corrosion and optimize the fuel in the process.

If the color of the liquid in the bottle is no longer blue, is it still safe to use?

Yes. It is possible for the dye in the formula to fade, but it is still perfectly functional.

What happens if I add too much fuel additive to my tank? Will it harm the engine?

No. Overpouring will not cause significant damage to your fuel tank. However, it’s best practice to avoid making this a habit. Miscalculating by an ounce here or there, so long as it is not over four total ounces, is acceptable.

Stabil 22239 Marine Fuel Stabilizer 8 Oz

Fully operational. Shipping worldwide, on schedule.Duty & taxes paid at delivery

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Fully operational. Shipping worldwide, on schedule.Duty & taxes paid at delivery

Help Track order

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6021 kr

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Sold byAmazon IcelandDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

🛥️ Keep your engine cruising smoothly—fuel stability that won’t let you down!

LIGHTWEIGHT COMPACT - At just 0.54 pounds, it’s the perfect addition to your boat maintenance kit without bulk.
PRECISION 8 OZ BOTTLE - Easy-to-measure size ensures the perfect dose every time—no waste, no guesswork.
MARINE GRADE PROTECTION - Specifically formulated for gasoline-powered boats, safeguarding your outboard motor.
TRUSTED BY PROFESSIONALS - Rated 4.8 stars by nearly 1,800 users who rely on STA-BIL for peak performance.
LONG LASTING FUEL FRESHNESS - Keeps your marine fuel stable for up to 24 months, preventing costly engine issues.

STA-BIL 22239 Marine Fuel Stabilizer is an 8 oz clear liquid additive designed to preserve gasoline fuel in marine engines for up to 24 months. Lightweight and easy to use, it prevents fuel degradation and protects outboard motors, making it a trusted choice among boat owners and professionals alike.

Specifications

ASIN	B000UJG0LE
Best Sellers Rank	#15,856 in Automotive ( See Top 100 in Automotive ) #113 in Oil & Fluid Additives
Brand	STA-BIL
Brand Name	STA-BIL
Capacity	8 Fluid Ounces
Color	Clear
Colour	Clear
Customer Reviews	4.8 out of 5 stars 1,792 Reviews
Fuel Type	Gasoline
Fuel type	Gasoline
Global Trade Identification Number	00073905222396, 30073905223097
Item Weight	0.54 Pounds
Item weight	0.54 Pounds
Material	High Density Polyethylene (HDPE)
Model Number	22239
Part Number	770-176
UPC	073905222396 182682942097
Unit Count	1 Count

Reviews

R**R

Excellent

Best stabiliser I have found. Run it in my Bf115 Honda outboard.

18.02.2026

F**I

Easy to measure and use.

Easy to use and economical additive for boat fuel.

21.01.2026

S**.

Only time will tell.

It seems not as my fuel separator has no water in it but only time will tell.

23.06.2024

M**.

Great fuel stabiliser!

Use this to store petrol in a 20 litre jerry can to fill boat and lawnmower tanks. The petrol seems to keep forever!

3.08.2025

S**R

Great for Boats

My Petrol had split , added this and it made sure boat started first time .

21.11.2025

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TrustScore 4.5 | 7,300+ reviews

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Received my product in pristine condition. Great service overall.

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2 months ago

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