10 Best Diesel Fuel Additive Duramax of December 2025

• MADE FOR OPTIMAL LUBRICATION: Your truck has been there for you every minute and every mile, which is why it’s important to keep it in pristine condition. At Opti-Lube, our goal is to keep your engine operating at its best. Our fuel additive helps to increase the lubricity properties of ultra-low-sulfur diesel (ULSD) so that you can play more and worry less.
• IMPROVES FUEL ECONOMY: Trucks are known for eating up fuel. Fortunately, there’s a way to fix that with Opti-Lube Summer+ Cetane formula. This diesel fuel additive has been shown to enhance fuel mileage year round, giving you more bang for your buck. With greater fuel economy, you’ll find increased power for summer driving.
• CLEANS INJECTORS: When your fuel injectors build up with residue, your engine doesn’t run as efficiently. Opti-Lube Summer+ Cetane formula cleans injectors while helping prevent future build-up. This helps to reduce deposits and emissions, making this lube compatible with all vehicle emissions systems. Additionally, it acts as rust and corrosion prevention to keep your vehicle in tip-top shape.
• ENHANCES PERFORMANCE: Whether during rain or shine, Opti-Lube Summer+ Cetane formula delivers. It works to improve the performance of your truck all year round. This fuel additive also helps separate water from Diesel fuel as a demulsifierand more than doubles the storage life of standard diesel fuel.
• MADE ESPECIALLY FOR SUMMER: Summertime is hard on your fuel. The higher temperatures can cause thermal degradation of the fuel much faster. Fuel prices tend to spike during the summer too, so you’re typically spending more when you’re at the pump. Our Summer+ Cetane is the best diesel fuel additive for warm weather and your wallet. It helps improve fuel mileage and helps prevent fuel breakdown.

Opti-Lube

• Southwest Diesel - Authorized Distributor

Stanadyne

• Restores/Increase Horsepower: detergents clean deposits in the injection system
• Reduces Fuel Consumption tests show an average of 4 percent improvement in MPG and gains up to 9.6 Percent
• Cetane Improver improves combustion resulting in better engine starting, running and reduced noise
• Reduces Wear: Lubricity improvers restore lubricity to ultra low sulfur diesel fuels
• Reduces Emissions reduces Smoke and Particulates

Stanadyne

• MADE FOR OPTIMAL LUBRICATION: Your truck has been there for you every minute and every mile, which is why it’s important to keep it in pristine condition and the tools in the toolbox. At Opti-Lube, our goal is to keep your engine operating at its best. Our fuel additive helps to increase the lubricity properties of ultra-low-sulfur diesel (ULSD) so that you can play more and worry less.
• IMPROVES FUEL ECONOMY: Trucks are known for eating up fuel. Fortunately, there’s a way to fix that with Opti-Lube XPD formula. This diesel fuel additive has been shown to enhance fuel mileage year round, giving you more bang for your buck. With greater fuel economy, you’ll find increased power for both summer and winter driving.
• CLEANS INJECTORS: When your fuel injectors build up with residue, your engine usually doesn’t run as efficiently. Opti-Lube XPD formula cleans injectors while helping prevent future build-up. This helps to reduce deposits and emissions, making this lube compatible with all vehicle emissions systems. Additionally, it acts as rust and corrosion prevention to keep your vehicle in tip-top shape.
• ENHANCES PERFORMANCE: Whether during rain, snow, or shine, Opti-Lube XPD formula delivers. It works to improve the performance of your truck all year round. This fuel additive also helps separate water from Diesel fuel as a demulsifier and more than doubles the storage life of standard diesel fuel. Contains enough Anti-Gel to keep fuel flowing down to -10F*.
• COMES WITH ACCESSORIES: With your purchase, you’ll receive 1 gallon of Opti-Lube XPD Formula Diesel Fuel Additive, a convenient hand pump, and 2 empty 8-ounce bottles for on-the-go travel. You can use the empty bottles for when you’re on the go. This diesel fuel treatment isn’t just limited to trucks; use it for your farm and construction equipment too!

Opti-Lube

• MADE FOR OPTIMAL LUBRICATION: Your truck has been there for you every minute and every mile, which is why it’s important to keep it in pristine condition. At Opti-Lube, our goal is to keep your engine operating at its best. Our fuel additive helps to increase the lubricity properties of ultra-low-sulfur diesel (ULSD) so that you can play more and worry less.
• IMPROVES FUEL ECONOMY: Trucks are known for eating up fuel. Fortunately, there’s a way to fix that with Opti-Lube XL Xtreme Lubricant formula. This diesel fuel additive has been shown to enhance fuel mileage, giving you more bang for your buck. With greater fuel economy, you’ll find increased power for summer driving.
• CLEANS INJECTORS: When your fuel injectors build up with residue, your engine doesn’t run as efficiently. Opti-Lube XL Xtreme Lubricant formula cleans injectors and helps prevent future build-up. This helps to reduce deposits and emissions, making this lube compatible with all vehicle emissions systems. Additionally, it acts as rust and corrosion prevention to keep your vehicle in tip-top shape.
• ENHANCES PERFORMANCE: Whether during rain, snow, or shine, Opti-Lube XL Xtreme Lubrication formula delivers. It works to improve the performance of your truck all year round. This fuel additive also helps separate water from Diesel fuel as a demulsifier and more than doubles the storage life of standard diesel fuel.
• COMES WITH ACCESSORIES: With your purchase, you’ll receive 1 gallon of Opti-Lube XL Xtreme Lubricant Formula Diesel Fuel Additive, a convenient hand pump, and 2 empty 4-ounce bottles for on-the-go travel. This diesel fuel treatment isn’t just limited to trucks; use it for your farm and construction equipment too!

Opti-Lube

• Restores/Increase Horsepower – detergents clean deposits in the injection system
• Reduces Fuel Consumption–tests show an average of 4% improvement in MPG and gains up to 9.6%
• Cetane Improver – improves combustion resulting in better engine starting, running & reduced noise
• Reduces Wear – lubricity improvers restore lubricity to ultra low sulfur diesel fuels
• Reduces Emissions – reduces Smoke and Particulates

Stanadyne

• BOOSTS cetane up to 7 points
• INCREASES power, performance, and fuel economy
• STABILIZE fuel & disperse moisture
• INCREASES lubricity & prevent rust and corrosion
• 1-2 OZ per 25 GAL of diesel fuel
• Treats 400 Gallons
• Concentrated daily fuel booster
• Fit type: Universal Fit
• Flash point: 142.0 degrees_celsius

Hot Shot's Secret

• Restores/Increase Horsepower: detergents clean deposits in the injection system
• Reduces Fuel Consumption tests show an average of 4 percent improvement in MPG and gains up to 9.6 Percent
• Cetane Improver improves combustion resulting in better engine starting, running and reduced noise
• Reduces Wear: Lubricity improvers restore lubricity to ultra low sulfur diesel fuels
• Reduces Emissions reduces Smoke and Particulates

Stanadyne

• Made in the U.S.A. Restores/Increase Horsepower.
• Reduces Fuel Consumption–tests show an average of 4% improvement in MPG and gains up to 9.6%
• Cetane Improver – improves combustion resulting in better engine starting, running & reduced noise
• Reduces Wear – lubricity improvers restore lubricity to ultra low sulfur diesel fuels
• Reduces Emissions – reduces Smoke and Particulates

Stanadyne

• MADE FOR OPTIMAL LUBRICATION: Your truck has been there for you every minute and every mile, which is why it’s important to keep it in pristine condition and the tools in the toolbox. At Opti-Lube, our goal is to keep your engine operating at its best. Our fuel additive helps to increase the lubricity properties of ultra-low-sulfur diesel (ULSD) so that you can play more and worry less.
• IMPROVES FUEL ECONOMY: Trucks are known for eating up fuel. Fortunately, there’s a way to fix that with Opti-Lube XPD formula. This diesel fuel additive has been shown to enhance fuel mileage year round, giving you more bang for your buck. With greater fuel economy, you’ll find increased power for both summer and winter driving.
• CLEANS INJECTORS: When your fuel injectors build up with residue, your engine usually doesn’t run as efficiently. Opti-Lube XPD formula cleans injectors while helping prevent future build-up. This helps to reduce deposits and emissions, making this lube compatible with all vehicle emissions systems. Additionally, it acts as rust and corrosion prevention to keep your vehicle in tip-top shape.
• ENHANCES PERFORMANCE: Whether during rain, snow, or shine, Opti-Lube XPD formula delivers. It works to improve the performance of your truck all year round. This fuel additive also helps separate water from Diesel fuel as a demulsifier and more than doubles the storage life of standard diesel fuel. Contains enough Anti-Gel to keep fuel flowing down to -10F*.
• ECONOMY: With a treatment rate up to 512 gallons it will cost you just pennies per treated gallon. This diesel fuel treatment isn’t just limited to trucks; use it for your farm and construction equipment too!

Opti-Lube