We’re dedicated to quality and performance.
Top-performing diesel engine oils, coolants, transmission fluids, gear oils, greases, and hydraulic oils—we got it all.
Fuel that keeps Wisconsin moving.
Gasoline, diesel, DEF, and bulk fuel delivery backed by dependable logistics and over 80 years of experience.
Premium lubricants for serious equipment.
Chevron, Petro-Canada, and industry-leading lubricants trusted by fleets, farms, and heavy equipment operators.
Catch the Wolf Pack on the Road.
From farm shows to fairs, see our products in action, and learn how we keep Wisconsin moving.
You rely on us to deliver. Our promise is to go the extra mile.
We offer comprehensive solutions tailored to your needs—because your business isn’t the same as the one down the road.
Our world relies on your fleet.
How you protect your equipment makes all the difference. You need to keep it ready and moving, which makes the oil you choose to protect it more important than ever.
Push boundaries with lubricants that outperform current standards.
We work with you to ensure your lubrication solutions minimize downtime, reduce maintenance costs, and extend equipment life.
How do we get you moving?
We know you count on us to keep your business moving. There are three points at the core of our operations.
Reliable Delivery
On-time, every time — backed by real people and real trucks with you as the priority.
Premium Products
From Chevron®, Petro-Canada®, PowerService® and more — not watered down.
Local & Personal
Custom solutions for your business. Your rep knows your name (and your fleet).
You're in Good Company
Don’t just take our word for it — hear from the businesses who’ve made the switch to Wolf.
“We really, really appreciate that E.H. Wolf has saved us a ton of money, particularly in the winter months.”
BILL SKINNER
“We know we’re getting an excellent product, we’re happy with the cost that we’re paying—and we get excellent, excellent service.”
CHRIS GOSCHEY
“Through E.H. Wolf I am able to obtain the quality products I need to pass on to my customers to give them quality life for their equipment.”
DELVIN WEAVER
Featured Products
Proven Protection. Smarter Performance.
Chevron® DELO® 400 XLE™ Synthetic Blend 15W-40 delivers the perfect balance of advanced engine protection and cost-effective performance. Designed for modern diesel engines operating under extreme loads, this API CK-4 oil uses a premium synthetic blend formula to fight wear, reduce deposits, and extend oil life—all while helping your fleet stay fuel-efficient and reliable.
Key Features & Benefits:
✅ Advanced Wear Defense: Protects pistons, rings, and bearings under heavy-duty conditions
✅ Extended Drain Performance: Longer oil life helps reduce maintenance costs and downtime
✅ Excellent Soot Dispersal & Cleanliness: Keeps engines cleaner for optimal performance
✅ Full Efficiency Support: Low-SAPS formula helps improve fuel economy and reduce emissions
✅ API CK-4, SN Approved: Meets the latest OEM requirements for both diesel and gasoline engines
✅ Mixed Fleet Versatility: Ideal for trucking, construction, agriculture, and more
Ideal for:
Heavy-Duty Diesel Engines (On- & Off-Highway)
Fleets Requiring API CK-4 Protection
Extended Drain Intervals
High Load, High Temperature Operations
Equipment with Aftertreatment Systems
Premium Diesel Exhaust Fluid (DEF) - Clean Emissions. Peak Engine Performance.
Our Premium Diesel Exhaust Fluid (DEF) is a high-quality, ultra-pure urea solution specially formulated to reduce harmful nitrogen oxide (NOx) emissions from diesel engines equipped with Selective Catalytic Reduction (SCR) technology. By converting NOx gases into harmless nitrogen and water vapor, DEF helps diesel vehicles meet stringent environmental standards while maintaining engine efficiency and fuel economy.
Manufactured to meet or exceed ISO 22241 standards, our DEF is designed for use in trucks, buses, construction equipment, and agricultural machinery — supporting fleets and operators committed to cleaner air and regulatory compliance.
Key Features:
✅ ISO 22241 Certified – Guaranteed purity and performance
✅ Compatible with SCR Systems – Optimizes emissions control in diesel engines
✅ Reduces NOx Emissions – Helps vehicles comply with EPA and global emissions regulations
✅ Improves Fuel Efficiency – Supports better combustion and engine operation
✅ Safe & Non-Toxic – Environmentally responsible and easy to handle
Ideal for:
Modern Diesel Engines (2010 and newer)
Off-Road Diesel Equipment
Diesel Generators
Fleet & Delivery Vehicles
Marine & Rail Applications
Built Tough to Take on Heavy Loads and Harsh Conditions.
Chevron® Starplex® HD 1 M3 keeps your gear moving when it matters most. This NLGI Grade 1 lithium complex grease is engineered for heavy-duty applications, offering superior wear protection, mechanical stability, and corrosion resistance to help extend equipment life and reduce maintenance downtime. Key Features & Benefits: ✅ Heavy-Duty Lithium Complex Thickener: Provides outstanding mechanical and thermal stability under stress ✅ NLGI Grade 1 Consistency: Smooth and pumpable for centralized lubrication systems and cold-weather use ✅ Extreme Pressure Protection: Guards against metal-to-metal wear in shock, vibration, and high-load conditions ✅ Water and Washout Resistance: Maintains protective film in wet, humid, or washdown-prone environments ✅ Rust and Oxidation Inhibitors: Prevents corrosion, extending component life and reliability ✅ Wide Temperature Range: Performs reliably across harsh and varying operating environments
Ideal For:
Heavy-duty trucks, trailers, and off-road equipment
Construction, mining, and agricultural machinery
Bearings, pins, bushings, and chassis lubrication points
Centralized lubrication systems requiring pumpable, high-performance grease
Equipment exposed to shock loads, moisture, and temperature extremes
Chevron Delo XLC 50/50 Antifreeze/Coolant – Extended Life Protection You Can Trust
Chevron Delo XLC 50/50 Antifreeze/Coolant is a heavy-duty, pre-mixed extended life coolant (ELC) formulated with advanced organic acid technology (OAT) for long-lasting, maintenance-free protection. Ready to use right out of the container, this 50/50 blend of coolant and deionized water provides superior corrosion protection for all cooling system metals, including aluminum, without the need for supplemental coolant additives (SCAs). Ideal for use in both on-road and off-road diesel engines, as well as gasoline and natural gas-powered vehicles, Delo XLC 50/50 offers up to 750,000 miles/8 years of reliable service life under recommended conditions. It meets or exceeds the performance requirements of leading OEMs, making it a trusted solution for fleets, commercial vehicles, and industrial equipment. Key Features: ✅ Pre-mixed 50/50 solution for easy top-off and fill ✅ Extended life formulation with OAT technology ✅ Protects cooling systems for up to 750,000 miles or 8 years ✅ Excellent corrosion protection for iron, aluminum, copper, brass, and solder ✅ Silicate-, phosphate-, nitrate-, and borate-free formula ✅ Meets or exceeds major OEM specifications including CAT EC-1, Cummins, Detroit Diesel, and more ✅ Compatible with most major ELC coolants
Ideal for:
Heavy-duty diesel engines—especially where OEMs specify nitrite/silicate-free coolants
Mixed fleets (cars, light trucks, heavy-duty vehicles, RVs) needing a universal 50/50 formula
Recreational vehicles and marine systems requiring robust freeze and boil protection
Maximize Uptime. Extend Engine Life. Trust the Power of DURON® 15W-40. Built for fleets that never stop moving, Petro Canada® DURON® High Performance 15W-40 Heavy-Duty Engine Oil delivers unbeatable protection under pressure. Whether you're hauling, digging, or plowing through extreme conditions, this advanced bulk engine oil formulation is engineered to optimize engine performance, reduce wear, and extend oil drain intervals — helping you cut downtime and control costs. Formulated with premium base oils and advanced additive technology, DURON® 15W-40 provides superior shear stability, soot control, and thermal resistance, making it the ideal solution for high-output diesel and gasoline engines alike. Key Features & Benefits ✅ Heavy-duty performance for on- and off-road diesel engines, including turbocharged and EGR-equipped units ✅ Extended oil life helps reduce maintenance costs and improve operational efficiency ✅ Outstanding wear protection even in high-load, high-heat environments ✅ Proven engine cleanliness and deposit control for reduced sludge and longer engine life ✅ Meets or exceeds API CK-4 and prior service categories, ensuring compatibility with a wide range of equipment
Ideal for:
Heavy-Duty Diesel Engines
Mixed Fleet Use
Engines Requiring API CK-4/CJ-4
High Load / High Temperature Conditions
Extended Oil Drain Intervals
Equipment with Aftertreatment Systems (Compatible with engines using Diesel Particulate Filters (DPF), Selective Catalytic Reduction (SCR), and Exhaust Gas Recirculation (EGR) systems)
Maximum Efficiency. Premium Engine Protection.
Built for peak performance and fuel economy, Chevron® Havoline® PRO DS 0W-20 Full Synthetic Motor Oil offers cutting-edge protection for today’s high-efficiency engines. With Deposit Shield® Technology and a low-viscosity, full synthetic formula, it defends against wear, sludge, and deposits—keeping your engine running clean, quiet, and strong no matter the conditions. Key Features & Benefits: ✅ Deposit Shield® Technology: Keeps engines clean by fighting sludge and varnish, extending performance and life ✅ Low-Viscosity Synthetic Formula: Enhances fuel economy without compromising wear protection in modern engines ✅ Advanced Wear Protection: Reduces metal-on-metal contact in stop-and-go, high-load, and high-speed conditions ✅ Superior Cold Start Performance: Rapid oil flow protects vital components during cold starts and harsh winters ✅ Turbocharger & LSPI Protection: Formulated to prevent low-speed pre-ignition (LSPI) and protect turbocharged direct injection engines ✅ Exceeds Industry Standards: Meets or exceeds API SP and ILSAC GF-6A for top-tier performance and compatibility Ideal For:
Late-model gasoline-powered vehicles requiring SAE 0W-20
Engines with turbocharging, direct injection, or variable valve timing
Drivers focused on fuel efficiency and extended oil change intervals
Hybrid vehicles and stop-start systems operating in cold climates
OEMs recommending API SP, ILSAC GF-6A, or earlier GF standards
Maximum Shift Performance, Minimal Wear. Get the smooth, confident shifting your transmission deserves. Kendall® VersaTrans® Full-Synthetic Low-Viscosity Automatic Transmission Fluid (ATF) is engineered with advanced full-synthetic base oils and proprietary friction modifiers to meet the demands of today’s fuel-efficient, high-performance automatic transmissions. It delivers superior wear protection, thermal stability, and shift consistency across a wide range of operating conditions. Key Features & Benefits: ✅ Full-Synthetic Formula – Resists thermal breakdown for extended fluid life and enhanced durability ✅ Low-Viscosity Design – Promotes better fuel economy and optimal cold-weather performance ✅ Excellent Oxidation Resistance – Maintains cleanliness and prevents deposit formation ✅ Friction-Stable for Smooth Shifts – Reduces clutch wear and shift shock ✅ Anti-Wear and Shear-Stable Additives – Extend transmission life under severe service ✅ Compatible with a Broad Range of OEM Requirements – Versatile for use in many modern vehicles
Ideal For:
Passenger cars and light trucks requiring a low-viscosity ATF
Modern 6- to 10-speed automatic transmissions
Fleet vehicles needing extended drain intervals and all-season performance
Environments where cold-start protection and fuel efficiency are priorities
Engineered to flow fast and protect hard.
Chevron® Starplex® EP 1 is the grease your gear can’t live without. This NLGI Grade 1 lithium complex extreme pressure grease combines smooth pumpability with heavy-duty wear protection, making it perfect for centralized lubrication systems and tough operating conditions. Designed to withstand shock loads, heavy stress, and varying temperatures, it keeps your equipment running longer and stronger. Key Features & Benefits: ✅ NLGI Grade 1 Consistency: Smooth and pumpable, ideal for automated and centralized lubrication systems ✅ Extreme Pressure Additives: Protects metal surfaces against wear under heavy loads and shock ✅ Lithium Complex Thickener: Provides excellent mechanical and thermal stability ✅ Water Washout Resistance: Maintains a protective film in wet and humid environments ✅ Rust and Oxidation Inhibitors: Extends equipment life and reduces maintenance needs ✅ Wide Temperature Range: Performs reliably from cold starts to high-heat conditions Ideal For:
Centralized lubrication systems in heavy-duty trucks, construction, and industrial equipment
Bearings, pins, bushings, and joints under moderate to heavy loads
Agricultural and forestry machinery operating in wet or dirty conditions
Equipment requiring pumpable grease with extreme pressure protection
Applications demanding consistent performance across a range of temperatures
Powerful, Safe, and Eco-Friendly Degreasing Solution
Oil Eater® Original Industrial Degreaser is a highly concentrated, water-based, non-toxic, and biodegradable cleaner designed to tackle the toughest grease and grime in industrial settings. Its alkaline-based formula effectively dissolves oil, grease, and dirt without the use of harsh solvents, making it safe for both users and the environment.
Key Features:
✅ Ultra-Concentrated Formula: Allows for dilution based on cleaning needs, providing cost-effective solutions for various applications.
✅ Non-Corrosive and Non-Toxic: Safe for use on a wide range of surfaces, including machinery, tools, concrete floors, and more.
✅ Biodegradable: Environmentally responsible choice that complies with safety standards.
✅ Versatile Applications: Ideal for use in manufacturing plants, automotive shops, food processing facilities, and other industrial environments.
Ideal for:
Cleaning engines and engine bays
Degreasing machinery and equipment
Maintaining cleanliness of concrete floors and driveways
Removing grease from tools and parts
General maintenance in industrial settings
Clean up spills fast with Eagle Picher Floor-Dry, the trusted solution for industrial-strength absorbency.
this premium clay-based absorbent quickly soaks up oil, grease, water, and other liquids on contact—leaving surfaces dry, safe, and slip-free.
Ideal for automotive shops, warehouses, factories, and garages, Floor-Dry is made from all-natural, kiln-fired clay granules that won’t break down or turn to sludge. Its low-dust, non-toxic formula makes it safe and easy to use indoors or out, whether you're tackling everyday drips or emergency spills.
Key Features:
✅ High-performance oil and liquid absorbent
✅ All-natural, kiln-fired clay for superior absorbency
✅ Ideal for shop floors, driveways, industrial facilities, and more
✅ Non-toxic, non-combustible, and low-dust
✅ 24-quart bag—easy to carry, store, and use as needed
✅ Helps prevent slip hazards and maintain OSHA compliance
Ideal For:
Clean up oil, brake fluid, coolant spills on shop floors or driveways
Handle leaks or chemical drips around machinery, workstations, and loading zones
The Wolf Guarantee:
Right Product. Right Application. Every Time.
Customer focused.
We are committed to assuring our customers that they can count on us to “do what we say and say what we do”. Our customers are the reason why we are in business, and we stand by that belief. We expect to earn your business by being a value-added partner and consultant.
Family owned.
Now growing the 4th generation of owners, E.H. Wolf & Sons has been family-owned since 1941. It started with Roy Wolf, a standard oil agent. Then, Roy’s son Ed took over, thus coining our name. Now, two of Ed’s children, Craig and Colette, manage the business.
Quality products.
We provide premium quality fuels, lubricants and ancillary products to meet the changing needs of our customers. Our commitment to our customers is that we will work diligently to earn your business through integrity, honesty, and high ethical standards.
Honest employees.
We search for the most talented individuals in their fields who will fit in with the culture at E.H. Wolf & Sons. From building strategies to goal setting to implementation, our team excels at every turn to ensure the long-term viability and strength of E.H. Wolf & Sons.
The Wolf Wire
Stay up to speed with the latest from Wolf—covering news, events, innovations, and more from our team.
Our Locations
Slinger
501 Kettle Moraine Drive South, Slinger, WI 53086
Green Bay
1121 McDonald Street, Green Bay, WI 54303
Verona
309 Bruce Street, Verona, WI 53593
Waukesha
1225 Whiterock Avenue, Waukesha, WI 55186
Neenah
321 High Street, Neenah, WI 54956
Oconomowoc
Our mission
EH Wolf & Sons is committed to utilizing our energy, lubricant, and fluid management solutions to bring value to our customers while prioritizing safety and maintaining high ethical standards.
Our commitment to you
We are committed to customer satisfaction. We will work diligently to earn your business through integrity, honesty, and high ethical standards.
