Howes Diesel Defender cleans injectors, improves mileage

Updated May 4, 2026
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Given the price of diesel and the state of the freight marketplace these days, it makes sense to keep your truck up to snuff and ready for any load that comes your way.

Howes Diesel Defender can help. It uses a proprietary detergent to clean your truck's fuel system and injectors. It also takes lubricity to the next level adding up to 2.5 times more than previous injector cleaners.

Diesel Defender is 100% petroleum-based and alcohol-free. That’s important because alcohol can dry out seals and gaskets. It also emulsifies water, which is important for the well-being of your truck’s engine.

Howes Diesel Defender improves power, performance, and mileage in several ways. It does all that while making your truck run cleaner. It contains IDX4 detergent that:

  • Cleans injectors
  • Reduces emissions
  • Eliminates harmful deposits
  • Prevents coking
  • Delivers more complete fuel combustion

But, that’s just one of the advantages Howes Diesel Defender delivers. It also removes water. By demulsifying water, it helps eliminate harmful microbial growth.

Finally, and importantly, because you need to stay profitable, Howes guarantees Diesel Defender will improve your fuel economy by 5 percent. 

Howes Diesel Defender is warranty safe and good for diesel and biodiesel.

Available at travel centers and other locations. 

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