
Summer temperatures can cause faster thermal degradation of diesel fuel, leading to higher fuel prices and potential engine issues. Using a diesel fuel additive can help prevent this. The best summertime diesel fuel additive will improve your engine's performance and fuel economy while reducing emissions output. Opti-Lube Summer+ Formula, Diesel Extreme, and E-ZOIL performance boosters are some of the top products in the market. Opti-Lube's Summer+ Cetane formula is designed to improve lubricity, enhance fuel mileage, and clean injectors, making it a popular choice for diesel engines. Diesel Extreme, on the other hand, boosts cetane ratings by seven points and acts as a lubricant and injector cleaner. E-ZOIL's additives are also known for their compatibility with biodiesel fuel and their ability to meet emission rules.
| Characteristics | Values |
|---|---|
| Brand | Opti-Lube |
| Product Name | Summer+ Cetane Formula |
| Use Case | Made for summer, improves performance all year round |
| Use | 1 gallon treats 2560 gallons of diesel fuel |
| Benefits | Improves fuel mileage, prevents fuel breakdown, acts as a demulsifier, increases lubricity, cleans injectors, prevents rust and corrosion |
| Cetane Rating | Increases cetane by 5-7 points |
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What You'll Learn

Opti-Lube Summer+ Cetane Formula
This diesel fuel additive has been shown to enhance fuel mileage, giving you more bang for your buck. It improves fuel economy, so you will find increased power for summer driving. It also acts as a demulsifier, helping to separate water from diesel fuel, and more than doubles the storage life of standard diesel fuel.
The product is available in a range of sizes, including a gallon that treats 2560 gallons of diesel fuel, a quart that treats 640 gallons, and a 4oz bottle that treats 80 gallons.
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Hot Shots Secret EDT+ Winter Defense
Hot Shot's Secret EDT+ Winter Defense is a 7-in-1 diesel treatment that prevents diesel fuel from gelling and icing. It contains a powerful cetane booster, a lubricity additive, a keep-clean detergent package, and de-icer chemicals.
The additive includes a special wax modifier that changes the temperature and method of wax crystal formation. This prevents wax build-up in the fuel filter, allowing the fuel to travel through the filter at temperatures 20°F below the cloud point (the wax solidification point) of diesel fuel. The de-icer keeps moisture from freezing and plugging up fuel filters down to -40°F, well below the freezing point of water.
The product also includes LX4 Lubricity Extreme, which improves lubricity for better fuel efficiency and power, and reduces the need for regen cycles. It also enhances ignition efficiency, prevents gum and sludge formation, and protects against corrosion.
Hot Shot's Secret offers a money-back guarantee on its products, promising to refund customers if its products do not deliver as promised.
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Cetane number and lubrication
During the refining process, diesel fuel receives a rating called a cetane number, which is an indicator of the combustion speed for the fuel and the compression that is necessary for ignition. The cetane number is similar to gasoline's octane rating, with higher numbers indicating better-quality fuel. Diesel engines typically perform well with fuel that has a cetane rating of 48 to 50. Diesel with lower numbers has longer ignition delays that require more time for combustion to be completed. Raising the cetane number is one of the fuel additive's jobs. It improves diesel's ignition speed and also acts as a lubricant, protecting fuel system components like pumps and injectors from premature deterioration.
Diesel Extreme is a popular additive that adds seven points to diesel's cetane score, improving the fuel's combustion performance. It also cleans and lubricates injectors and other critical fuel system components. Peak's Blue Agri-Clean is another additive that boosts cetane by five points while improving injector performance, reducing emissions, and improving the fuel's overall efficiency. It is formally designated an "upper cylinder lubricant with injector cleaners and fuel treatments."
Opti-Lube Summer+ Cetane Formula is a diesel fuel additive made specifically for summertime use. It helps improve fuel mileage and prevents fuel breakdown due to higher temperatures. It also increases the lubricity properties of ultra-low-sulfur diesel (ULSD) and cleans injectors while helping to prevent residue buildup. This additive is designed to keep your engine operating at its best, improving performance and enhancing fuel economy.
In addition to cetane gains and lubrication, a good diesel additive can offer other benefits such as improved fuel economy and reduced emissions output. Some additives are designed to address issues that arise in severe cold conditions, where diesel fuel can transform into a waxy, gel-like substance that restricts fuel flow and causes damage. Anti-gel additives help prevent this issue and can also clear built-up gel from lines and filters. Stabilizer additives are also useful for preventing fuel degradation in varying temperature conditions.
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Fuel economy and injector performance
Diesel fuel additives are designed to clean injectors and filters in fuel systems. They can also improve fuel economy and injector performance. One of the most popular additives for diesel drivers is the 5-in-1 fuel system cleaner by STP, which helps increase fuel economy and cleans carbon deposits throughout the fuel system. This helps to reduce emissions and fights engine wear by reducing friction on key components.
Hot Shot’s Secret Diesel Extreme is another highly-rated diesel fuel additive that removes injector deposits, increases engine performance and efficiency, boosts engine power, and improves fuel economy. It also removes excess water and cleans and lubricates the engine system for maximum performance.
Opti-Lube XL is a diesel fuel additive that improves fuel economy by focusing on lubricity. It keeps injectors clean and should be used whenever you fill your tank.
Archoil Diesel Fuel Additive is another option that cleans injectors, increases fuel economy, and extends engine life. It also restores power and fuel efficiency and reduces carbon deposits throughout the engine.
Finally, Chevron Techron Concentrate Plus is a powerful fuel system cleaner that cleans fuel injectors, carburetors, intake valves, and combustion chambers. It restores engine power, maximises fuel economy, and reduces exhaust emissions.
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Anti-gel and anti-gelling
Diesel fuel is susceptible to thermal degradation in the summer, which can be mitigated by using additives. Opti-Lube Summer+ Cetane Formula is a popular choice for diesel fuel additive in the summer. It improves fuel mileage, prevents fuel breakdown, and acts as a demulsifier, helping to separate water from diesel fuel. It also increases the lubricity properties of ultra-low-sulfur diesel (ULSD) and cleans injectors, preventing residue buildup.
In cold weather, diesel fuel tends to transform into a waxy, gel-like substance, which can restrict fuel flow and cause severe damage. Anti-gel additives help prevent this gelling process. Howes Diesel Treat is a well-known anti-gel additive that prevents gelling in cold temperatures and acts as a fuel conditioner. It is safe to use, as it does not contain alcohol or harmful solvents, and it is effective in all diesel and biodiesel fuels.
Hot Shots Secret EDT+ Winter Defense is another anti-gel additive that prevents gelling, protects the diesel fuel system, and improves cold starts. Archoil AR6300 is also mentioned as an effective anti-gel additive.
Anti-gel additives are crucial for preventing fuel gelling in cold weather, and there are several options available that can help improve engine performance and protect your fuel system.
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Frequently asked questions
Opti-Lube Summer+ Formula Diesel Fuel Additive is a great option for improving the performance of your truck in the summer. It helps improve fuel mileage, prevents fuel breakdown, and increases the lubricity properties of ultra-low-sulfur diesel (ULSD).
Opti-Lube Summer+ Formula Diesel Fuel Additive is designed to address the challenges of summertime fuel usage, such as higher temperatures accelerating fuel degradation and increasing fuel prices. By improving fuel mileage and preventing fuel breakdown, this additive helps you save money and maintain optimal engine performance.
This additive increases the lubricity properties of ultra-low-sulfur diesel (ULSD), which reduces friction and wear on engine components. It also cleans fuel injectors, preventing residue buildup and improving engine efficiency.
Yes, Opti-Lube Summer+ Formula Diesel Fuel Additive also acts as a demulsifier, effectively separating water from diesel fuel. This not only improves engine performance but also extends the storage life of diesel fuel.
Opti-Lube Summer+ Formula Diesel Fuel Additive is available for purchase on Amazon.com, where it has received positive reviews for its effectiveness in improving engine performance and fuel economy.











































