King Oil Lubricants logo

Rugged Lubricants for Extended Equipment Life

Tel 240-707-6464
Fax 240-238-4444

12314 Huyett Lane
Hagerstown , MD 21740

Industries We Work With

At King Oil, our personal touch extends to all industries that utilize oil.

agriculture and farming

Agriculture & Farming

Lubricants play a crucial role in maintaining and sustaining farming machinery.



Lubricants play a vital role in maintaining heavy machinery and ensuring smooth operations.


Lubricants play a crucial role in maintaining heavy machinery and ensuring smooth operations.

Auto & Trucking

Lubricants are unsung heroes that keep the wheels turning and the engines humming.

repair shops

Repair Shops

Lubricants serve as essential tools for maintaining and servicing vehicles and machinery.

The King Oil Difference

Rugged Lubricants for Hardworking Applications

Local Manufacturing and Personalized Service

Oil Analysis and Custom Blending

Commitment to Honesty and Integrity


What Our Customers Have to Say

Customer reviews are an invaluable source of feedback for King Oil. We encourage all customers to give us an honest review. With this information we can improve as a supplier and be better for the next customer. 

Our Products

We specialize in a wide range of lubrication products.

Motor Oils

Heavy-duty motor oils, also known as HD engine oils, are specifically formulated for use in diesel engines that operate under demanding conditions. These engines are commonly found in trucks, buses, construction equipment, agricultural machinery, and other heavy-duty vehicles. Let’s explore the key aspects of heavy-duty motor oils:

Purpose and Characteristics
  • Lubrication: HD motor oils provide essential lubrication to engine components, reducing friction and wear.
  • Heat Dissipation: They help dissipate heat generated during combustion, preventing engine overheating.
  • Cleaning and Protection: These oils contain additives that keep the engine clean by preventing sludge buildup and protecting against corrosion.
  • Viscosity Stability: HD oils maintain consistent viscosity across a wide range of temperatures, ensuring proper lubrication in both cold starts and high-temperature conditions.
Types of Heavy-Duty Motor Oils
  • Conventional: Traditional mineral-based oils suitable for older diesel engines.
  • Synthetic: Engineered for superior performance, synthetic HD oils offer better protection and longer life.
  • Synthetic Blend: A mix of conventional and synthetic base oils, providing a balance of performance and cost-effectiveness.
Common Applications
  • Trucking and Transportation: Long-haul trucks, delivery vehicles, and buses rely on HD motor oils to withstand extended highway driving and heavy loads.
  • Construction and Mining Equipment: Bulldozers, excavators, and loaders operate in harsh environments, requiring robust lubrication.
  • Agricultural Machinery: Tractors, combines, and harvesters benefit from oils that protect against dust, dirt, and extreme temperatures.
  • Repair Shops: Mechanics use HD oils during engine maintenance and overhauls.

Remember that choosing the right heavy-duty motor oil depends on your specific vehicle, usage, and operating conditions. Regular oil changes with the appropriate oil type are essential for maintaining engine health and longevity.

King Oil's engine oils are used in internal combustion engines to reduce friction between moving parts, protect against wear, clean and cool the engine, and enhance its overall performance and longevity. Strictly using a King Oil brand motor oil will improve your fuel economy.

Heavy Duty Diesel Engine Oils
  • Magnum Moly Big Plus 15W40 CK-4
  • Magnum Moly Big Plus 15W40 CK-4 NT
  • Magnum Moly Big Plus 15W40 CI-4+
  • Magnum Moly Big Plus 15W40 CI-4+ NT
  • Magnum Moly Big Plus SynDiesel 5W40 CK-4
  • Magnum Moly Big Plus SAE 30
  • Magnum Moly Big Plus SAE 40
Gas Engine Oils
  • Magnum Moly TPA 5W20 NT
  • Magnum Moly TPA 5W30 NT
  • Magnum Moly TPA 10W30 NT
  • Magnum Moly Synthetic TPA 0W20 NT
  • Magnum Moly Synthetic TPA 0W30 NT
  • Magnum Moly TPA 30
tractor fluid

Tractor Transmission Fluids

Tractor transmission fluid, also known as universal tractor fluid (UTF), is a specialized hydraulic fluid designed specifically for use in tractor transmissions, hydraulic systems, and wet brake systems. Let’s explore its essential characteristics and functions:

Lubrication and Cooling
  • Tractor transmission fluid plays a crucial role in lubricating moving parts within the transmission system.
  • It facilitates smooth gear shifts by reducing friction and wear.
  • As the transmission components operate, the fluid also dissipates heat, preventing overheating.
Hydraulic Power Transmission
  • Beyond lubrication, UTF serves as a hydraulic medium in tractors.
  • It powers various hydraulic functions, such as lifting implements, steering, and operating attachments.
Benefits of Using the Right UTF
  • Performance Optimization: Adequate heavy-duty transmission fluid ensures smooth operation, especially during startup and in extreme temperatures.
  • Oxidation Resistance: High-quality UTF resists oxidation, maintaining its effectiveness over time.
  • Cost Optimization: Proper fluid selection contributes to cost-effective tractor maintenance.
  • Meeting OEM Requirements: Using the right fluid ensures compliance with original equipment manufacturer (OEM) specifications.
Longevity and Efficiency
  • UTF extends the life span of tractor components, reducing wear and tear.
  • It keeps the transmission system operating efficiently, contributing to overall productivity.

Remember, choosing the correct universal tractor fluid is essential for optimal tractor performance and longevity. Whether you’re plowing fields or harvesting crops, the right fluid keeps your machinery running smoothly!

King Oil's Tractor Hydraulic Fluid (UTF) is a specialized lubricant used in tractors and other agricultural machinery to power hydraulic systems, transmissions, and wet brake systems to ensuring smooth operation and protection of the equipment. Use a King Oil branded UTF to ensure the most life out of your machine.

Tractor Fluids
  • Power King Tractor Fluid
  • Power King Tractor Fluid NT
  • Power King Tractor Fluid North
  • Power King Tractor Fluid North NT
TO-4 Spec Fluids:
  • Power King TO-4 10W
  • Power King TO-4 30W
  • Power King TO-4 50W
  • Power King TO-4 10W NT
  • Power King TO-4 30W NT
  • Power King TO-4 50W NT
  • Power King Hydra CAT 10W NT
hydraulic fluids

Hydraulic Fluids

Hydraulic fluid serves as the vital medium for transferring power within hydraulic machinery. Whether it’s a heavy excavator, a garbage truck, or an aircraft’s flight control system, hydraulic fluids play a critical role. Let’s dive into the details:

Functions and Properties
  • Power Transmission: The primary function of hydraulic fluid is to convey power. It enables force transmission through pressurized liquid.
  • Non-Compressibility: Hydraulic fluids must have low compressibility (high bulk modulus) to efficiently transmit force.
  • Air Release: They release air quickly to prevent air pockets that could hinder performance.
  • Foam Resistance: Low foaming tendency ensures smooth operation.
  • Volatility: Low volatility prevents excessive evaporation.
  • Heat Transfer: Hydraulic fluid also acts as a medium for heat transfer within the system.
Sealing and Lubrication
  • As a sealing medium, it maintains adequate viscosity and shear stability.
  • It provides lubrication to moving parts, reducing friction and wear.
  • Proper viscosity ensures film maintenance and minimizes internal leakage.
  • Base Stock: Most hydraulic fluids are based on mineral oil due to its lubricating properties and high-temperature stability. Natural oils (like rapeseed) are used for biodegradability.
  • Specialty Base Stocks: For extreme conditions, other base stocks include glycol ethers, organophosphate esters, polyalphaolefin, propylene glycol, and silicone oils.
  • Unique Alloy: NaK-77, a sodium-potassium eutectic alloy, serves as hydraulic fluid in high-temperature and high-radiation environments.
  • Excavators and Backhoes: These rely on hydraulic systems for digging and lifting.
  • Hydraulic Brakes and Power Steering: Cars use hydraulic fluids for braking and steering.
  • Aircraft Flight Control Systems: Precise movements are achieved through hydraulic power.
  • Industrial Machinery and Lifts: Factories and warehouses utilize hydraulic systems.

Remember, choosing the right hydraulic fluid ensures efficient operation and longevity of hydraulic machinery. Whether you’re lifting tons of earth or steering your car smoothly, hydraulic fluids keep the power flowing!

King Oil's Hydra King series is a fluid used in hydraulic systems to transmit power, lubricate components, and reduce wear, ensuring efficient and smooth operation of machinery and equipment.

  • Hydra King AW 22
  • Hydra King AW 32
  • Hydra King AW 46
  • Hydra King AW 68
  • Hydra King AW 100
  • Hydra King AW 22 NT
  • Hydra King AW 32 NT
  • Hydra King AW 46 NT
  • Hydra King AW 68 NT
  • Hydra King HVI 46
gear oil

Gear Oils

Gear oil, also known as gear lubricant, is a specialized type of lubricant designed specifically for use in transmissions, transfer cases, and differentials of automobiles, trucks, and other machinery. Let’s explore its key characteristics and functions:

Purpose and Importance
  • Friction Reduction: Gear oil minimizes friction and wear between the gears within these critical components.
  • Heat Dissipation: It helps dissipate heat generated during gear operation, preventing overheating.
  • Protection: Gear oil forms a protective layer, preventing metal-to-metal contact and reducing wear.
  • Rust and Corrosion Prevention: It guards against rust and corrosion, especially in wet or harsh conditions.
  • Viscosity is a crucial property of gear oil. It determines the film thickness between gear surfaces.
  • Proper viscosity ensures smooth gear engagement and efficient power transmission.
  • Gear oils contain additives that enhance performance under various conditions.
  • These additives improve properties such as extreme pressure (EP) protection, anti-wear capabilities, and oxidation resistance.
Base Oil Type
  • The choice of base oil depends on operating conditions and gear type.
  • Common base oils include mineral oil, synthetic oil, and specialty base stocks like polyalphaolefin (PAO).
  • Manual Transmissions: Gear oil is essential for smooth gear shifting in manual transmissions.
  • Differentials: It ensures proper power distribution between wheels.
  • Transfer Cases: Used in 4WD and AWD systems.
    Industrial Gears: Beyond automotive applications, gear oil is vital in industrial machinery.

Remember, choosing the right gear oil ensures optimal gear performance, longevity, and reliability. Whether you’re shifting gears on the road or powering heavy machinery, gear oil keeps things running smoothly!

King Oil's Gear King series are lubricants specifically designed for transmissions, transfer cases, and differentials in vehicles and machinery, providing protection against wear, reducing friction, and ensuring smooth operation of gear systems.

GL-5 & GL-1:
  • Gear King GL-1 90
  • Gear King GL-5 80W90 NT
  • Gear King GL-5 85W140 NT
  • Synthetic Gear King GL-5 75W90 NT
  • Synthetic Gear King GL-5 80W140 NT
  • Power King Synthetic CD-50 Trans NT
  • Gear King EP 100 NT
  • Gear King EP 150 NT
  • Gear King EP 220 NT
  • Gear King EP 320 NT
  • Gear King EP 460 NT
  • Gear King EP 680 NT
  • Synthetic Gear King EP 100 NT
  • Synthetic Gear King EP 150 NT
  • Synthetic Gear King EP 220 NT
  • Synthetic Gear King EP 320 NT
  • Synthetic Gear King EP 460 NT
Worm Gear:
  • Gear King Worm Gear 320 NT
  • Gear King Worm Gear 460 NT
  • Synthetic Worm Gear 150 NT
  • Synthetic Worm Gear 220 NT
  • Synthetic Worm Gear 320 NT
  • Synthetic Worm Gear 460 NT
skid loader oil

Skid Loader Oils

Skid loader oils, also known as skid steer loader oils, are specialized lubricants designed specifically for use in skid steer loaders. These versatile machines are commonly used in construction, landscaping, agriculture, and other industries. Let’s explore the key aspects of skid loader oils:

Function and Importance
  • Lubrication: Skid loader oils provide essential lubrication to various components within the loader, including the engine, hydraulic system, and transmission.
  • Heat Dissipation: They help dissipate heat generated during operation, preventing overheating and ensuring optimal performance.
  • Wear Protection: Proper lubrication reduces wear and extends the lifespan of critical parts.
Types of Skid Loader Oils
  • Engine Oil: Skid loaders typically use engine oil for lubricating the internal combustion engine. The right viscosity and quality are crucial for engine health.
  • Hydraulic Oil: Skid loaders rely on hydraulic systems for lifting, steering, and other functions. Hydraulic oil ensures smooth operation and protects hydraulic components.
  • Transmission and Gear Oil: Some skid loaders have separate transmissions or gearboxes. Transmission oil or gear oil is used to lubricate these components.
Choosing the Right Oil
  • Manufacturer Recommendations: Always follow the manufacturer’s guidelines for oil type, viscosity, and change intervals.
  • Operating Conditions: Consider the temperature range, load, and duty cycle when selecting skid loader oils.
  • Quality: Use high-quality oils with the right additives for optimal performance.

Remember, proper maintenance and using the right skid loader oils contribute to efficient operation and durability. Whether you’re moving dirt, lifting materials, or clearing snow, well-lubricated skid loaders get the job done!

King Oil's Skid Loader Oil is a specialized lubricant used in skid loaders to ensure proper functioning and protection of the engine, hydrostatic systems, and other critical components under heavy-duty operating conditions. This oil is fortified with 2,800 PPM of Zinc for superior protection.

  • Power King Skid Loader Oil NT
gasoline additive


Let’s explore the world of fuel and oil additives. These specialized products enhance engine performance, protect components, and improve efficiency. Here’s what you need to know:

Fuel Additives

Fuel additives are mixed with gasoline or diesel to enhance specific properties. Here are some common types:

  • Fuel Flow Improvers: These additives prevent wax from settling in cold temperatures, ensuring smooth fuel flow through fuel lines and filters.
  • Deicing Additives: Used primarily in aviation fuels, they prevent ice formation in fuel lines and tanks.
  • Biocides: Combat microbial growth (like algae) in stored fuels.
  • Foam Inhibitors: Reduce foam formation during fueling.
  • Fuel Stabilizers: Extend the shelf life of stored fuels.
  • Corrosion Inhibitors: Protect metal components from rust and corrosion.
Oil Additives

Oil additives work like vitamins for your engine. They enhance engine performance by:

  • Reducing Friction: Lubricating moving parts, reducing wear, and preventing sludge buildup.
  • Cooling the Engine: Dissipating heat generated during operation.
  • Cleaning Valves and Injectors: Improving fuel combustion efficiency.
  • Reducing Engine Noise and Vibration.
  • Increasing Fuel Economy.

Remember, choosing the right additive depends on your specific needs and vehicle type. Whether you’re maintaining an older engine or seeking peak performance, these additives can make a difference!

Fuel additives are added to diesel or gasoline to enhance performance, improve fuel efficiency, clean engine components, and prevent fuel system deposits and corrosion.

Diesel Fuel Additives:
  • Summer NT 801
  • Winter NT 807
Gasoline Additive:
  • Super NT 890
Oil Additive:
  • NT Oil Additive
specialty oil

Specialty Oils

Specialty lubricants are a fascinating category of lubricants designed for specific applications and unique conditions. Let’s explore their diverse uses and properties:

High-Performance Lubricants
  • Synthetic Lubricants: These advanced oils are engineered for extreme temperatures, high pressures, and demanding environments. They outperform conventional mineral-based oils in terms of stability, viscosity, and wear protection.
  • Silicone Lubricants: Known for their resistance to oxidation, water, and extreme temperatures, silicone-based lubricants are commonly used in electrical applications, o-rings, and seals.
  • Perfluorinated Lubricants: These specialty lubricants, such as perfluoroether (PFPE), excel in harsh chemical environments, vacuum conditions, and extreme temperatures. They’re often used in aerospace, semiconductor manufacturing, and precision machinery.
Extreme Pressure (EP) Lubricants
  • These additives enhance lubricants’ ability to withstand heavy loads and prevent metal-to-metal contact. Commonly used in gearboxes, industrial machinery, and automotive differentials.
Specialized Industrial Lubricants
  • Railroad Lubricants: Formulated for rail switches, tracks, and wheel flanges to reduce wear and friction.
  • Textile Lubricants: Used in textile machinery to minimize thread breakage and improve efficiency.
  • Metalworking Lubricants: Tailored for cutting, drilling, and machining operations to improve tool life and surface finish.
Aerosol Lubricants
  • Convenient spray-on lubricants for hard-to-reach areas, hinges, locks, and moving parts.
  • Dry Film Lubricants: These aerosols leave a thin, dry film that reduces friction without attracting dust or dirt.
Corrosion Inhibitors
  • These specialty lubricants protect metal surfaces from rust and corrosion. Commonly used in marine, outdoor, and humid environments.

Remember, specialty lubricants are like precision tools—each designed for a specific purpose. Whether you’re maintaining machinery, exploring space, or baking bread, there’s a specialty lubricant for every need!

King Oil has the ability to specially formulate an oil meeting your industry's spec. These oils are formulated to meet unique performance requirements and operating conditions, ensuring optimal efficiency and equipment longevity in specialized environments. No matter your industry, King Oil's got you covered.

  • Break In Oil 30
  • King Super Solvent 32
  • Tool King Air-Line Oil
  • Spindle Oil 10W
  • Heat King Transfer Fluid
  • Hydra King Concrete Form Oil
  • Air Compressor Oil 68
  • Air Compressor Oil 100
  • Synthetic A/C Oil 46
  • Synthetic A/C Oil 100
  • Synthetic A/C Oil 150
  • Synthetic A/C Oil 220
  • Tool King Rock Drill 100
  • Tool King Rock Drill 150
  • Tool King Rock Drill 220
  • Turbo King 22
  • Turbo King 32
  • Turbo King 46
  • Way King 32
  • Way King 68
  • Way King 100

We Work Hard to Provide You with Exceptional Products and Personalized Customer Service.

Serving National and Local Customers.
Get in touch with us today so we can show you the King Oil difference.