Cenex® Ruby Fieldmaster®
Fueled by Innovation. Powered to Perform.®
Precisely formulated premium off-road diesel with a terminally injected additive package for optimal power, performance and protection.
The next generation of premium diesel fuels
Cenex® Ruby Fieldmaster® premium diesel fuel is precisely formulated to deliver superior engine performance and fuel efficiency while preventing costly equipment downtime, even in the harshest field environments.
An industry-leading premium diesel additive package enhanced with:
- Advanced, aggressive detergency that effectively removes engine deposits and keeps injectors clean, extending engine lifespan
- A state-of-the-art two-phase total water management system that optimizes combustion and boosts engine function
- Exceptional filterability that protects equipment from harmful contaminants, minimizing equipment damage and operational disruptions
- A complete fuel burn that minimizes waste and improves overall fuel efficiency, delivering more hours per gallon
Better than any off-road premium diesel formula that has come before
Power through tight deadlines and rugged work conditions with high-quality, dependable Cenex Ruby Fieldmaster.
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Aggressive detergency package
Keep engines running cleaner, longer with an aggressive detergency package that gives you optimal engine performance and efficient combustion—better than any formula that’s come before. -
Total water management system
The two-phase system efficiently separates free water from fuel, allowing it to settle quickly at the bottom of fuel storage tanks for easy drainage and removal. Any remaining negligible water is encapsulated for safe passage through the combustion chamber, ensuring your fuel system runs smoothly and efficiently. -
A more complete fuel burn1
With lower temperature fluctuations, more complete combustion is managed evenly across the entire engine. That’s because ultra-clean injectors share the work. As a result of this improved efficiency, less soot is produced and fewer regenerations occur—and that means less wear and tear on the exhaust system. -
Exceptional filterability
Keep equipment running smoother, longer with exceptional filterability that protects the engine and exhaust aftertreatment systems.
1. In comparison to the previous generation of Cenex® premium diesel fuel
Superior chemistry. Superior performance.
Injection and combustion optimization
Addresses fuel oxidation problems in new engine technology
- Prevents diesel fuel from coking
- Reduces critical component and injector repairs and replacements
- Prevents internal diesel injector deposits from forming deep inside high-precision injectors
Storage stability
Extends storage life months longer than typical #2 diesel
- Tolerates temperature extremes
- Reduces gum and varnish buildup
- Increases injector life and optimizes combustibility
Corrosion protection
Protects fuel lines from rust and corrosion
- Prevents rust and corrosion from forming on metal parts
- Protects fuel systems from rust and pitting
- Prevents corrosion-caused leaks, blocking and breaks
- Slows natural diesel fuel degradation caused by exposure to oxygen
Improved lubricity
Protects moving parts from excessive wear and failure
- Provides 10% to 15% more lubricity2
- Protects engine components, injector and fuel pumps against wear
- Meets OEM fuel lubricity recommendations
2. In comparison to typical #2 diesel
High cetane number
Enhances ignition quality for quicker, smoother starts
- Generates fewer emissions for longer-lasting diesel particulate filters
- Fewer regenerations
- Reduces wear and tear on vehicle starter and battery
- Improves cold weather starts
Cenex Total Protection Plan® Warranty
The Cenex Total Protection Plan® warranty is a comprehensive risk management tool for your operation that keeps you in the field and provides you peace of mind. It’s the best warranty in agriculture, extending protection well beyond the OEM’s warranty across a wide range of equipment for up to 10 years or 10,000 hours.
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Unmatched industry expertise
High-quality Cenex premium diesel and lubricants products are engineered to enhance equipment performance, extend engine life and power daily operations in the field, on the job site and over the road.
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Our IndustriesAgricultureFuel operations and protect farm equipment in every season.Learn more -
Our industriesConstructionSafeguard equipment from onsite debris and heavy loads.Learn more -
Our industriesMiningStand up to extreme working conditions.Learn more
Fuel up
Cenex is one of the only fuel distributors with a robust network for innovative, terminally-injected premium diesel fuel products widely available through our network of diesel fuel distributors and suppliers.
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Regional diesel fuel suppliers
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