AMSOIL Gasoline Stabilizer (AST) reduces the oxidation process that occurs when fuel is stored for extended periods, improving performance, extending equipment life and decreasing maintenance expenses.
Package sizes include:
16-oz. Bottle
16-oz.
Bottles (case of 6)
It is difficult to drain all of the fuel from equipment before storage, and doing so would expose the system to other problems, including the formation of rust and corrosion on the bare metal in the tank and fuel system and the drying and cracking of gaskets and seals. Some fuels are pre-treated with
oxidation inhibitors that allow them to be stored for short periods without forming excessive deposits, while other fuels have no inhibitors at all.
AMSOIL Gasoline Stabilizer (AST) reduces the oxidation process that occurs when fuel is stored for extended periods, improving performance, extending equipment life and decreasing maintenance expenses.
Two- and four-stroke recreational vehicles, hand-held power equipment, small engines, construction and farm equipment are commonly operated seasonally or infrequently, then stored for long periods of time. During these periods of inactivity, and as a result of fluctuations in ambient temperatures, water vapor can form condensate within the engine. When this condensate comes into direct contact with steel and iron components, it forms surface corrosion on cylinder liners, piston rings, anti-friction bearings and steel/iron contact surfaces on rotational seals. Long periods of storage can also dry out cylinders, often resulting in permanent
damage when the equipment is taken out of storage and dry started. In addition, fuel within stored equipment tends to oxidize and form varnish and sludge deposits that clog injectors, fuel lines and carburetors, stick floats and cause poor engine performance, starting problems, increased maintenance expenses and decreased equipment life.
1-oz. of AMSOIL Gasoline Stabilizer treats 2.5 gallons of fuel.
This product is not expected to cause health concerns when used for the intended application and according to the recommendations in the Material Safety Data Sheet (MSDS).
Click here to view the MSDS Data Sheet for AMSOIL AST.
Keep out of the reach of children. Don't pollute. Return used oil to collection centers.
Product Name: Gasoline Stabilizer (AST)
Current Rating: 4.83out of 5 stars
Votes & Reviews: 69 vote(s) and 75 user reviews.
Reviewed by Pete: 
Great product. I've used this for many years and the gasoline is always ready to use.
Reviewed by Mark:
I use Gasoline Stabilizor in alll my 4-stroke lawn equipment. The product seems to work well as I have yet to have a fuel related problem since first using a year and a half ago. Gave it 4 stars simply because the bottle design makes it impossible to pour small quantities without spilling or having the stabilizer run down the side of the bottle. The bottle shape is great for pouring into a car fuel tank but I see the primary use of this product in small, 5 gallon or less applications. Which Amsoil would offer a different bottle design. A great start would be something similar to the Sta-bil bottle; where you can meassure and pour small amounts directly from the bottle.
Reviewed by Jeffery:
Replaces the Stabil I have been using
Reviewed by John P:
I store 30 gallons of fuel for my generator. I rotate 10 gallons every 30 days, so my oldest fuel is 90 days old. I have not done a placebo test with out stabilizer, but the gasoline treated with Amsoil stabilizer works flawlessly.
Reviewed by BW:
I use this product in every small engine, tool as well as my plow truck, 4-wheeler, and side-by-side and boats. It far exceeds any other stabilizer I have used, and I think I have tried them all. This product is so good - every piece of equipment I own starts at the beginning of every season, just like I ran it the day before!
Reviewed by Five:
Works just as it said it would!
Reviewed by Wrick:
Doing what it's supposed to be ,happy customer
Reviewed by Greg:
Great for my car in storage and my lawn mower
Reviewed by Hollywood:
Great stuff, use on all of our small engines
Canada
United States
Works well
Really good product