10 Best Fuel Additives 2025 in the United States

The Chevron 65740-CASE Techron Concentrate Plus Fuel System Cleaner is a highly rated fuel additive designed to clean and protect the entire fuel system, including fuel injectors, carburetors, intake valves, and combustion chambers. It is suitable for various fuel types, and users can find more specific recommendations in the vehicle owner's manual. The product claims to restore lost power and fuel economy, reduce engine issues like rough idling and hesitation, and improve cold start performance.

Additionally, it enhances fuel stability for up to a year, making it a versatile additive for maintaining engine health. This pack of six 20 oz. bottles is an economical choice for regular maintenance. The product is made in the USA. Users should be mindful of the concentration and dosage instructions to avoid potential engine damage. The long-standing reputation of the Chevron brand in the automotive industry adds to its credibility.

While the benefits are clear, the product's efficacy may vary depending on individual vehicle conditions and usage patterns.

The Lucas LUC10013 Fuel Treatment is designed for gasoline engines and comes in a convenient 1-gallon size, making it suitable for regular maintenance of cars, trucks, or other gas-powered vehicles. It stands out for its ability to clean and lubricate the entire fuel system, including injectors and carburetors, which helps maintain engine efficiency.

Users can expect better fuel economy and smoother acceleration thanks to reduced deposits that otherwise slow down fuel flow. An important feature is its ability to neutralize issues caused by low sulfur fuels, which can clog engines over time. Additionally, it helps lower harmful emissions and protects against rust and corrosion, extending the life of your engine parts. The product is made by Lucas Oil, a well-known brand with strong customer ratings (4.8 out of 5 from over 22,000 reviews), indicating reliability and satisfaction.

This additive is specifically formulated for gasoline and not suitable for diesel engines. The fuel additive is a solid choice for gasoline engine owners looking for improved performance, longevity, and cleaner emissions in a trusted, easy-to-use product.

The Lucas Oil 10003 Fuel Treatment is a highly regarded fuel additive that caters to both gasoline and diesel engines, making it suitable for a wide range of vehicle owners. One of its standout features is its ability to improve fuel economy, which can be appealing for those looking to save on gas costs. It claims to enhance performance by cleaning and lubricating the fuel system, including important components like fuel injectors and carburetors. This treatment not only aims to increase MPG but also boosts power and acceleration by optimizing fuel flow and reducing deposits, which can be especially beneficial for older vehicles that may struggle with performance.

Another significant advantage is its role in neutralizing harmful contaminants such as sulfur, which can lead to engine wear over time. The product also helps prevent rust and corrosion, potentially extending the life of engine components. Additionally, Lucas Oil has a strong reputation in the automotive industry, further reinforcing buyer confidence.

While some users praise its effectiveness, individual results can vary based on vehicle condition and maintenance history. Some customers may find it slightly more expensive compared to other fuel additives on the market. Furthermore, since it’s a concentrated treatment, users need to pay attention to the recommended dosage for optimal results, which could be a bit daunting for those unfamiliar with using fuel additives.