POWER, PREVENTIVE MAINTENANCE, AND PERFORMANCE

Summer means long days, heavy loads, and hard-earned miles—on the job or off the grid. Howes Diesel Defender is built for diesel pickups that work and play above 32°F. It cleans injectors, boosts lubricity, removes water, and improves fuel economy. Use it at every fill-up to keep your truck running strong all summer.

 

 

 

 

 

SIZED FOR EVERY DIESEL

Comes in 15 oz, 1 quart, and half-gallon bottles—convenient sizes to match your diesel needs, whether you’re running a single pickup, managing a fleet, or fueling equipment on the job. No matter the size of your tank, Diesel Defender makes it easy to get the right dose every time.

Part # Size Treat Rate
103024 15 oz. 1 oz. to 5 gal.
103022 1 quart 1 quart to 160 gal.
103020 1/2 gal. 1/2 gal to 320 gal.

 

 

 

ALREADY SEEING RESULTS

I've been using Howes Diesel Defender in my diesel truck for a month, and I'm already seeing positive results. While it's still early days, I'm encouraged by the initial improvements in fuel economy and overall engine performance. So far, I've noticed: Improved Fuel Efficiency: My truck seems to be getting better mileage, which is a great start. Smoother Engine Operation: The engine feels a bit quieter and runs more smoothly. I'm excited to continue using Diesel Defender and see if these positive trends continue over time.

-M. LUHRS

 

 

 

Pickuptruck

ADDS MAXIMUM LUBRICITY

  • Delivers unmatched lubricity—more than any other Howes product or leading competitor

  • Reduces internal wear to protect your engine over the long haul

  • Ideal for diesel pickup trucks needing daily power and protection

  • Lab-tested using ASTM D975 HFRR wear scar test

  • Outperforms both U.S. and European lubricity standards

  • Supports long-term engine health and peak performance

CLEANS INJECTORS

  • Powers through tough deposits with advanced IDX4® Detergent

  • Cleans your entire fuel system in just three treatments (when used as directed)

  • Restores lost power by removing harmful carbon buildup

  • Prevents new deposits from forming for long-term performance

  • Keeps your diesel pickup running strong—whether you’re hauling heavy or cruising the open road

Increases Fuel Economy

  • Maximizes every gallon—formulated to improve fuel economy by 5% or more

  • Removes water safely to protect your fuel system and engine

  • Keeps injectors clean for a consistent, efficient spray pattern

  • Prevents wasted fuel and helps maintain peak combustion

  • Use at every fill-up to save money and keep your pickup running strong

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