10 Best Gas Tank Cleaners 2025 in the United States

The Chevron Techron Concentrate Plus Fuel System Cleaner is a concentrated liquid cleaner designed specifically for gasoline engine fuel tanks. This cleaner excels in reducing common engine performance issues such as rough idle, engine surge, hesitation, and spark plug fouling, making it a reliable choice for maintaining engine health. It also improves cold start performance and enhances fuel stability for up to a year, offering long-term benefits to users.

The unscented formula means it won't leave any unpleasant smells during use, which can be a plus for many users. Its compatibility with most gasoline engines ensures it can be widely used, adding to its convenience. One 20 oz. bottle should be sufficient for single use, making it relatively straightforward to apply.

Chevron's reputation provides additional confidence in its quality. However, it's worth noting that while the cleaner is highly effective, it may require regular application depending on your vehicle's condition and usage, which could add to maintenance costs over time. Additionally, as with any chemical product, proper handling and storage are necessary to prevent any mishaps. The product dimensions and weight make it easy to store and handle. For those looking for a well-reviewed and highly effective fuel system cleaner, especially those dealing with frequent engine issues, Chevron Techron Concentrate Plus is a solid choice.

The Red Line 60103 SI-1 Complete Fuel System Cleaner is a strong contender for anyone looking to keep their gas tank and fuel system in good shape. This product is a liquid additive designed to clean fuel injectors, carburetors, valves, and combustion chambers by breaking down harmful deposits like gum and varnish. It uses a concentrated blend of detergents that work well in both high and low temperatures, which means it’s effective for most gasoline engines.

Users appreciate that it’s unscented and easy to use—just one bottle per tank for a thorough clean, making it convenient to maintain your vehicle’s fuel system. It also helps stabilize gasoline, which can improve fuel efficiency and engine performance. The 15-ounce bottles come in a two-pack, giving good value if you plan to use it regularly. However, it’s mainly suited for automotive gasoline engines, so if you have a diesel engine or need a cleaner for other fuel types, this might not be the best match.

While it cleans nearly 100% of deposits in one treatment according to the maker, some users might need repeated use for heavily clogged systems. This product is a reliable and well-regarded choice for those wanting to prevent corrosion and keep their fuel system running smoothly without complex steps.

The Gumout 510021W-6PK Fuel System Cleaner is a concentrated additive designed to keep your fuel system clean by preventing deposits on fuel injectors, carburetors, intake valves, and ports. This helps maintain engine performance and fuel economy, which is exactly what you want from a gas tank cleaner. It is safe for use in modern vehicles, including those with turbochargers and superchargers, and won't harm oxygen sensors or void your vehicle’s warranty, making it broadly compatible and worry-free to use.

One key strength is its ability to reduce emissions while maximizing engine efficiency, which is a bonus if you’re environmentally conscious or want to meet emission standards. The product is easy to use; typically, you just add it to your fuel tank before refilling. It’s suitable for regular maintenance rather than deep or one-time cleaning, so using it routinely will help keep your fuel system running smoothly.

Gumout’s cleaner is a reliable choice for most drivers looking for a straightforward, safe, and effective fuel system treatment to maintain their engine’s health and fuel efficiency. The pack of six bottles offers good value if you plan to maintain your vehicle long-term.