AMSOIL Quickshot Gasoline Treatment and Stabilizer
AMSOIL Quickshot is a concentrated gasoline treatment built for two-stroke and four-stroke powersports engines and small equipment that run on ethanol-blended pump gas. Each 8 oz. (236 ml) bottle cleans fuel systems, disperses water that ethanol pulls into the tank, and stabilizes fuel during short-term storage between rides, mowings, weekends, and seasons.
Cleans deposits in carburetors, injectors, and combustion chambers
Quickshot uses an aggressive detergent chemistry that detaches and carries away the varnish, gum, and insoluble debris left behind by degraded fuel. The same package goes after hard-to-remove deposits on piston tops, spark plugs, and other combustion-chamber surfaces, where buildup contributes to pre-ignition, rough idling, and poor throttle response. Restoring clean injector spray patterns and clean carburetor jets helps small engines and powersports motors return to peak performance.
The treatment is engineered to address the lowest-additive-concentration (LAC) detergent floor used in U.S. retail gasoline. That minimum is not enough to keep critical fuel-system components clean, so a stronger top-treat detergent is what makes the difference for engines that sit, idle slowly, or run on inconsistent fuel.
Fights ethanol-related phase separation
Ethanol attracts water out of the air. Once enough water collects, the ethanol-water layer drops to the bottom of the tank in a process called phase separation. When that mixture is pulled into the engine, it creates a lean-burn situation that raises combustion-chamber temperatures and can damage the engine. Quickshot is designed to keep water dispersed in tiny droplets throughout the fuel tank so it moves out through the combustion chamber as a normal part of operation, decreasing the chance of ethanol separating from the gasoline.
In testing with fuel containing 10 percent ethanol, Quickshot delivered a 70 percent flow improvement in controlled injector-plugging, and oxidation stability improved 44 percent over untreated fuel. That combination of detergency and stabilizer chemistry is the reason Quickshot is positioned for ethanol-blended pump gas rather than for diesel or for race fuel.
Protects against water and corrosion
Water enters fuel tanks through condensation, gas-pump residue, and humid storage environments. Left untreated, it causes hard starting, performance degradation, rust, and corrosion on metal fuel-system components. By keeping water dispersed in molecule-sized droplets and safely moving it through the combustion chamber, Quickshot helps maintain engine performance and protect against damaging corrosion in tanks, fuel lines, carburetors, and injectors.
Stabilizes fuel for short-term storage
Quickshot is built for short-term storage between uses, the kind of stretch that hits boats parked between weekends, generators that sit between outages and lawn equipment that rests for several weeks at a time. For multi-month or off-season layups, the product family also includes AMSOIL Gasoline Stabilizer, which is formulated for extended-storage protection. Pick the right product for the storage timeframe with the AMSOIL Quickshot guide linked below.
Built for two-stroke and four-stroke powersports and small engines
The formula covers a wide range of two-stroke and four-stroke gasoline engines, including motorcycles, snowmobiles, boats, personal watercraft, ATVs, edgers, tillers, mowers, snowblowers, chainsaws, generators, and farm or construction equipment. AMSOIL P.i. Performance Improver is the matched product for larger engines and passenger vehicles, where it delivers a deeper top-end cleaning treatment.
Recommended applications and service intervals
Quickshot is designed for an initial clean-up dose of 8 oz. (236 ml) per 6 gallons (23 litres) of gasoline, followed by a maintenance dose of 8 oz. (236 ml) per 12 gallons (45 litres) thereafter. Slight over-treatment has no negative consequences. For best protection, treat with every tank.
- Initial clean-up dose: 8 oz. per 6 gallons of gasoline.
- Continued-protection dose: 8 oz. per 12 gallons of gasoline.
- Approved for two-stroke and four-stroke powersports engines, small engines and seasonally used equipment.
- For larger engines and passenger vehicles, AMSOIL P.i. Performance Improver is the matched fuel additive.
Quickshot is compatible with the matching AMSOIL two-stroke or four-stroke engine oil already in the equipment and does not change any filter or oil-change interval. For multi-month or seasonal layups, pair Quickshot with AMSOIL Gasoline Stabilizer as outlined in the AMSOIL Quickshot guide. To match the same machine to the right AMSOIL oil and filters, start with the AMSOIL vehicle lookup guide.
Order AMSOIL Quickshot Gasoline Treatment and Stabilizer
Quickshot is available in bottle and case packaging for small engines, powersports equipment, and seasonal storage prep. Review treat rates, ethanol context, and storage timeframe in the AMSOIL Quickshot guide, then Buy online.
Customer reviews
Amsoil products
I only use Amsoil products in all my engines large and small
By David from Orlando, FL on July 09, 2026.
Would recommend this to a friend.
Yes
Parfait semble marché
By Dany on May 13, 2026.
Would recommend this to a friend.
A must have for seasonal machines
I add this to the fuel for both ATV and dirtbikes to prevent having fuel injector or carburator gumup issues. I have not had any issues since I started using Quickshot. This is a must have in my book.
By Dustin from New Mexico on May 12, 2026.
Would recommend this to a friend.
Read all 353 reviews
Frequently asked questions
How is AMSOIL Quickshot used in a fuel tank?
Quickshot calls for an initial clean-up dose of 8 oz. per 6 gallons of fresh gasoline. After that, switch to a continued-protection dose of 8 oz. per 12 gallons added with each fill. Slight over-treatment has no negative consequences, so dosing accuracy down to the ounce is not required. For ongoing benefit, treat every tank.
Is Quickshot safe in two-stroke engines?
Yes. The formula is engineered for both two-stroke and four-stroke gasoline-powered engines, which is why it covers chainsaws, weed trimmers, snowmobiles, personal watercraft, dirt bikes, and outboards alongside four-stroke mowers and generators. It does not replace the two-stroke oil already mixed into the fuel.
Is Quickshot the right choice for ethanol-blended pump gas?
Yes. Quickshot was tested in fuel containing 10 percent ethanol and is built specifically for the deposit, water-dispersion, and oxidation-stability problems that come with ethanol-blended retail gasoline. Cars and trucks running E10 still benefit from a deeper top-end cleaner like AMSOIL P.i. Performance Improver, while powersports and small engines are the core target for Quickshot.
What is the difference between Quickshot, Gasoline Stabilizer, and P.i.?
Quickshot is the multi-function fuel treatment for short-term storage and routine use in powersports and small engines. AMSOIL Gasoline Stabilizer is built for long-term, off-season storage in cars, boats, lawn equipment, and powersports gear that will sit for many months. AMSOIL P.i. Performance Improver is the deep-cleaning concentrate for passenger cars, light trucks, and larger engines. The AMSOIL Quickshot guide walks through the choice.
Can Quickshot be used in equipment that runs ethanol-free gas?
Yes. Even with ethanol-free fuel, the detergent package still cleans varnish and combustion-chamber deposits, and the stabilizer chemistry still helps fuel resist oxidation between uses. Quickshot is not ethanol-only.
Will Quickshot fix a carburetor that is already gummed?
Quickshot is formulated to dissolve and carry away gum, varnish, and insoluble debris from carburetors, fuel injectors, and fuel filters. Mild deposits are typically cleared with the initial clean-up dose run through normal operation. Heavy gumming or stuck floats may still call for mechanical disassembly and cleaning.
Does using AMSOIL Quickshot void a powersports OEM warranty?
No. Use of an aftermarket fuel additive does not by itself void an OEM warranty. Equipment built and serviced according to the manufacturer manual remains within warranty terms, and Quickshot is approved for use across the powersports and small-engine applications listed on this page.
