198136778 | Welcomia | Dreamstime.com
680148005840f2f04d6257fb Dreamstime L 198136778 1

Product Spotlight: 2025 diesel additives

May 2, 2025
Explore this roundup of additives for diesel engines that improve efficiency and help reduce maintenance costs.

Cenex

Cenex diesel fuels are formulated to deliver optimal power, performance, and protection. The enhanced additive package includes an aggressive detergency package that Cenex says effectively removes engine deposits and keeps injectors clean. In addition, Cenex Roadmaster XL protects equipment from contaminants, improves engine performance with a total water management system, and increases power and fuel efficiency with a more complete fuel burn. Cenex says its on-road diesel fuel can improve engine performance and fuel economy while reducing downtime and maintenance costs.

Hot Shot’s Secret

For fleet owners and independent operators, Hot Shot’s Secret says its Everyday Diesel Treatment (EDT) can maximize fuel efficiency and diesel engine longevity. According to the manufacturer, the treatment can improve fuel economy up to 7.3%, increase cetane levels by 7 points, and enhance overall combustion efficiency. EDT can also prevent injector deposits, reduce DPF regens, and maximize lubricity to protect fuel system components from wear. In addition to ensuring smoother engine operation and improved throttle response, EDT reduces emissions while maintaining a clean fuel system. It is easy to use with every fill-up and is compatible with all diesel fuels, including ULSD and biodiesel blends. Hot Shot’s Secret says a fleet will run more efficiently, experience fewer breakdowns, and benefit from lower operating costs with EDT.

See also: Product Spotlight: Asset tracking solutions

Lucas Oil

Lucas Oil says its CK-4 diesel oil blend is built to protect today’s modern diesel engines. Formulated with API Group II and Group III base oils and a cutting-edge additive package, the manufacturer says CK-4 delivers performance, durability, and efficiency. It meets Cummins CES20086 standards, so it is capable of delivering protection under severe operating conditions. Available in synthetic blend and petroleum options, CK-4 fights soot, resists oxidation, extends oil life, and helps reduce filter maintenance. The company states that CK-4 is capable of withstanding high temperatures and heavy loads, and that its unique formula allows it to blend well with other oils, making it suitable for mixed fleet environments.

Rislone 

Rislone’s Diesel DEF Treatment Super Concentrate is a formula designed to improve selective catalytic reduction system efficiency, stabilize diesel exhaust fluid, and prevent AdBlue/DEF crystallization. Under certain conditions, DEF can break down and leave white crystal deposits behind. As they build up, these crystals clog the SCR system and cause performance problems. Rislone says that regular use of its Diesel DEF Treatment protects the tank, pump, heater, sender, lines, injector, and mixer against harmful crystal deposits. It’s suitable for diesel vehicles that are regularly driven at low speeds, with light loads, for short durations, or that make frequent stops, as they are especially prone to developing crystal deposits. One 33-ounce bottle treats up to 55 gallons of DEF and should be added with every DEF tank refill.

About the Author

Jenna Hume | Digital Editor

Digital Editor Jenna Hume joined FleetOwner in November of 2o23 and previously worked as a writer in the gaming industry. She has a bachelor of fine arts degree in creative writing from Truman State University and a master of fine arts degree in writing from Lindenwood University. She is currently based in Missouri. 

Voice your opinion!

To join the conversation, and become an exclusive member of FleetOwner, create an account today!

Sponsored Recommendations

Boost truck leasing profits with telematics insights! Reduce maintenance costs, improve uptime, and strengthen customer relationships. Learn how data drives success.
This free guide outlines simple steps for hiring and onboarding commercial drivers while ensuring that you meet Regulation Part 391 and maintain fully compliant driver qualification...
Ready to boost fleet efficiency by up to 50%? Learn how AI-powered dispatch and next-gen tech are transforming TMS workflows, improving driver planning, and streamlining operations...
Gain a strategic edge in today’s evolving fleet landscape. Join us to explore how fuel cards are helping fleet managers cut costs, enhance control, and prepare for an electrified...