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.Customs & duties included in the price

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Fully operational. Shipping worldwide, on schedule.Customs & duties included in the price

Help Track order

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₩120048

Duties & taxes included

In stock

Sold byAmazon South KoreaDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

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Description

🛥️ Keep your engine running smooth, even when the water’s rough!

COMPACT DURABLE - Lightweight 0.54 lb HDPE container fits easily in your gear bag without leaks or spills.
MARINE GRADE PROTECTION - Specifically formulated to protect outboard motors and marine fuel systems from corrosion and deposits.
TRUSTED BY PROFESSIONALS - 4.8-star rating from over 1,800 users proves it’s the go-to stabilizer for serious boaters.
EASY PRECISE APPLICATION - 8 oz bottle designed for simple, accurate dosing—no guesswork, no waste.
FUEL FRESHNESS GUARANTEED - Keeps gasoline 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 maintain gasoline freshness and protect marine engines from corrosion and deposits. Trusted by thousands of boat owners, it extends fuel life up to 24 months and comes in a durable, easy-to-use HDPE bottle weighing just 0.54 pounds.

Specifications

ASIN	B000UJG0LE
Best Sellers Rank	#58,670 in Automotive ( See Top 100 in Automotive ) #268 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 1,812 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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₩120048

Duties & taxes included

In stock

Sold byAmazon South KoreaDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to South Korea.

Secure transaction

Trustpilot

TrustScore 4.5 | 7,300+ reviews

Abdullah B.

Great price for an authentic product. Fast international shipping too!

3 weeks ago

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Fantastic experience overall. Will recommend to friends and family.