Diesel Defender

Diesel Defender 100% guaranteed

Diesel Defender

Maximum Lubrication & Superior Cleaning for Unrivaled Performance

The best defense against low lubricity and harmful deposits. Howes Diesel Defender cleans fuel injectors, prevents coking and all harmful deposits while adding up to 2.5 times the amount required lubricity to provide superior power and performance. Diesel Defender also protects your system by safely removing water and is guaranteed to increase fuel economy and save you money.

Available sizes:

32 oz 64 oz

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Adds Up To 2.5x More Lubricity

When compared to Howes Meaner Power Kleaner, making it the #1 choice for heavy duty vehicles.


Guaranteed Minimum 5% Improvement In Fuel Economy

When used as a year round solution to lower lubricity and harmful deposits, Diesel Defender provides unmatched performance and guarantees a 5% increase in fuel economy.


Cleans Fuel Injectors

Howes Diesel Defender uses its superior IDX4® detergent, a powerful detergent, to provide maximum cleaning power. IDX4® cleans the toughest deposits from your injectors and keeps them clean, improving performance and fuel economy. When used as directed, Diesel Defender reduces emissions by providing more complete fuel combustion, reducing the need for Cetane improvers.


Removes Water

Many products emulsify or disperse water and frequently use alcohols or solvents that can do damage to your engine. Diesel Defender is a premium, petroleum based product that demulsifies water, safely removing it from diesel fuel.

Other Features Include
  • Provides maximum lubricity in injectors, pumps and upper cylinders
  • IDX4® Detergent cleans all types of injector deposits including Internal Diesel Injector Deposits (IDID) and prevents future deposits
  • Safely removes water, eliminating the environment that promotes microbial growth.
  • Guarantees a minimum 5% increase in fuel economy
  • Reduces exhaust emissions and boosts engine performance and power
  • Warranty safe and effective in all diesel and biodiesel fuels including home heating oil
  • Contains no alcohol or harmful solvents


Truck Trucks

Tractor Tractors

Construction Construction


Home Home Heating Oil

Treatment Ratios

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

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DIESEL DEFENDER - Maximum Lubrication & Superior Cleaning for Unrivaled Performance.

Fuel Savings Calculator

Diesel Defender (64 oz. Bottle) suggested retail
Total treatment cost
Total Saving from 5% gain in fuel economy


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Howes offers a complete line of additives and lubricants designed to keep you on the road.