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.

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Description

FUEL SYSTEM CLEANER: Cleanses the entire fuel system using PEA additives, including fuel injectors, lines, & fuel pumps. This advanced formula removes water, gum, and varnish, ensuring optimal performance & longevity of your fuel system while preventing corrosion.
CORROSION PROTECTION: Industry-leading rust and corrosion protection & designed for in-season cleaning & the protection of internal fuel system parts.
PERFORMANCE BOOSTER: Designed to optimize fuel performance which contributes to enhanced gas mileage & improved engine power. This advanced formula cleans & protects the fuel system, allowing for efficient combustion & prolonged engine life.
DIRECTIONS: Pour directly into fuel tank prior to fill up. Use 1 oz for every 10 gallons of fuel. Run the engine for 5 minutes to treat the entire fuel system.
YEAR-ROUND PROTECTION: Pair STA-BIL In-Season Marine Protection with STA-BIL Storage, providing a complete solution for both in-season operation & storage needs during the winter ensuring that your watercrafts remains in peak condition year-round.
FUEL STABILIZER: Stabilizes fuel in-season when watercraft is idle. For specific storage needs, use our STA-BIL storage fuel stabilizer product.

Fuel Treatment, Ethanol, Container Size 32 oz. , Size/Net Weight 32 oz. , Blue/Green, Bottle, Transparent, Treats 320 Gallons Dilution Ratio, Boiling Point 180 F, Flash Point 173 F, 0. 9 Specific Gravity, For Use With Ethanol Engines Review: This Sab-Bil product is like having your own personal Mechanic. I have been using Sta-Bil for such a long time now that it's a must have in my opinion, in fact i find it as important as a life jacket. I park up for 3 months at a time over winter and when i start the engine it Puuurs. I have just fitted a new 250hp Yamaha and this motor will also be looked after with Sta-Bil Marine Ethanol Treatment. Review: Our favorite fuel treatment to use. I add it anytime we use ethanol gas in the boat and for every winter storage. Keeps the fuel good for next time!

Reviews

L**R

This Sab-Bil product is like having your own personal Mechanic. I have been using Sta-Bil for such a long time now that it's a must have in my opinion, in fact i find it as important as a life jacket. I park up for 3 months at a time over winter and when i start the engine it Puuurs. I have just fitted a new 250hp Yamaha and this motor will also be looked after with Sta-Bil Marine Ethanol Treatment.

6.07.2024

A**S

Our favorite fuel treatment to use. I add it anytime we use ethanol gas in the boat and for every winter storage. Keeps the fuel good for next time!

23.12.2025

J**H

Stabil owns the market when it comes to fuel saving additive. I find the marine blue is a much better product than the red.

3.11.2023

P**.

good deal, would buy from seller again

8.12.2025

L**Z

Great product

28.04.2019

Manufacturer	Gold Eagle Co.
Brand	STA-BIL
Model	22240
Product Dimensions	27.79 x 24.74 x 22.86 cm; 875.43 g
Item model number	22240
Manufacturer Part Number	22240
OEM Part Number	GDE22240
Special Features	PREVENTS CORROSION – STA-BIL 360 Marine Ethanol Treatment & Fuel Stabilizer is the ultimate treatment and protection against ethanol blended fuels. This formula contains PEA fuel system cleaners, and it removes water from your gas tank which prevents gum, varnish, rust, and corrosion from appearing.
Item Weight	875 g

STA-BIL Marine Fuel System Treatment | Full Fuel System Cleaner, Fuel Injector Cleaner | Fuel Additive for Boats & Watercrafts, In-Season Cleaning & Protection 32 Fl. Oz.

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