Berwick Oil is now part of Ag Partners Cooperative, expanding our Energy team, locations, and delivery capabilities while continuing the dependable local service customers have come to know.
Our field service and delivery teams are available virtually around the clock during planting and harvest and have even delivered propane on a holiday weekend to keep homeowners warm. We know you have options when it comes to fuel and propane service, and we'd welcome the opportunity to earn your business. If you’re a coop member, you’ll also be putting some of that money right back in your own pocket when patronage checks are mailed out.
Ag Partners provides propane monitors tailored for large businesses and cooperatives, ensuring efficient fuel management, real-time usage tracking, and uninterrupted operations.
Through our Cenex Lubricant Terminal, we offer premium lubricants and DEF (Diesel Exhaust Fluid) in bulk quantities for farms, commercial operations, and cooperatives. Backed by Cenex’s trusted reputation and our commitment to outstanding service, we ensure dependable delivery and competitive pricing to support your operations. Partner with us to access the products you need to keep your equipment running smoothly, meet emissions standards, and keep your business moving forward.
Take the hassle out of your life with a trusted and reliable company to meet your propane needs. We offer tank sales and leasing, contracting, and a variety of other options to keep your propane costs low. From home heating to grain drying, Ag Partners will make sure you have safe, efficient energy when and where you need it.
We will refill bottled propane used for grills, RV's and trucks.
Refilling available at
Take the hassle out of your life with a trusted and reliable company to meet your propane needs. We offer tank sales and leasing, contracting, and a variety of other options to keep your propane costs low.
Our 18-man energy driving team has over 100 years of delivery experience and is dedicated to efficient energy delivery as well as keeping your house safe with our safety checks.
Ag Partners offers bulk propane delivery to homes, farms, shops, and businesses out of our Sabetha, Seneca, Hiawatha, Humboldt, Stella, St. Marys, and Troy locations.
For propane questions, please contact the location nearest you.
Delivery During Service Hours:
Seneca: 785.336.6153, Option 2
Sabetha: 785-284-2227
Hiawatha: 785.742.2196, Option 2
Stella: 402-883-2445
St. Marys: 785.437.2984
Troy: 785-985-3553
After Hours Emergency Delivery (added fee):
Seneca: Will Engelken 785.294.2518 or Eric Osterhaus 785.294.2722
Sabetha: Allen Baker 785.508.0856
Hiawatha: Rusty Bannister 785.288.1442 or Eric Osterhaus 785.294.2722
Stella: Mick McLaughlin 402.239.8821
St Marys: Alan Lierz 785.336.1159 or Eric Osterhaus 785.294.2722
Troy: Sean Price 785.741.5565
Low Income Energy Assistance (LIEAP) Information >
Whether you're heating your home or business or drying grain, propane provides a safe, efficient, and reliable energy source when proper safety practices are followed. At Ag Partners, safety is at the center of everything we do. We're committed to providing dependable propane service while adhering to strict industry, state, and insurance safety standards developed through decades of research and experience.
The propane industry has identified three key practices that play an important role in keeping propane systems operating safely:
Don't let a tank run out of propane. If the tank does run out, it is imperative to perform a leak check before returning the tank to service.
Replace all regulators when they reach the manufacturer's recommended replacement age. Usually, the limit is 15 years old.
Perform a leak test on the propane system once every 5 years even if there are no indications of a problem or leak.
We offer Cenex Top Tier gasoline and Premium Diesel Fuels. Cenex Ruby Fieldmaster® premium diesel fuel provides optimal off-road performance for high-tech engines, including those that meet the Tier IV Final EPA emission standards. Its industry leading, multifunctional additive package contains a unique combination of seven additives that prevents injector fouling and filter plugging to minimize costly downtime.
We have 24-hour access cardtrol fuel pumps in Axtell, Bern, Corning, Denton, Hiawatha, Powhattan, Robinson, Sabetha, Seneca, Stella NE, Troy, Vliets, and Willis. They all accept customer fuel cards that are linked to your Ag Partners Coop account so you can receive one total bill each month. All pump locations, with the exception of Vliets, also accept major credit cards.
Fuels:
On-Road Diesel:
Off-Road Diesel:
The Barn by Berwick Oil convenience stores in Sabetha, Hiawatha, and Troy offer quality fuel, everyday convenience items, and friendly local service. As part of the Ag Partners family, The Barn continues its long-standing commitment to serving the communities it calls home while providing a convenient stop for customers on the go.
Fuels:
On-Road Diesel:
Off-Road Diesel:
Delivery Services
As a farmer, you face a multitude of hard-to-control challenges. One thing you can control is what you put in your equipment. Cenex lubricants stand the test of time with more than 75 years of proven off-road performance. They keep your engines and hydraulics running smoothly and provide superior protection for overworked load-bearing equipment.
We offer bulk delivery of:
DEF is also available at the pump at our Seneca cardtrol location.
We offer:
We keep on hand:
What It Does
Address fuel oxidation problems in new engine technology fuel injectors and prevents internal diesel injector deposits (IDID) from forming deep inside high-precision injectors.
How You Benefit:
- Less filter and injector replacements in new engine technologies
- Less downtime and maintenance costs
What It Does
Aggressive detergent components keep fuel systems clean and performing at their optimum level.
How You Benefit:
- Improved fuel efficiency (up to 5% better in comparison to a typical #2 diesel fuel)
- 4.5% improved power
- Cleans injectors and prevents deposit buildup
- Maintains ideal injector spray pattern
What It Does
Cetane is a measure of diesel engine startability. The higher the cetane number, the quicker the fuel will ignite. Cenex Premium Diesel Fuel has a typical cetane number of 47-49.
How You Benefit:
- Reduced strain on engines and electrical systems
- Less downtime and maintenance cost
- Quicker, more fuel-efficient starts
- Smoother running engines
- Better cold weather starts
What It Does
Friction-reducing agents provide 10-15% better protection against friction and wear on the fuel pump than typical #2 diesel fuel.
How You Benefit:
- Protects injectors and injector pumps against wear
- Meets OEM fuel lubricity recommendations
What It Does
Demulsifiers force water to the bottom of the tank, allowing for easy drainage and removal. This prevents unwanted moisture from being carried through the fuel system and reduces the volume of water entering the combustion chamber.
How You Benefit:
- Easier removal of water from storage tank
- Less wear on injectors
- Fewer filter replacements
- Prevents algae formation in storage tanks
What It Does
Provides superior corrosion protection, preventing the formation of rust on metal parts.
How You Benefit:
- Reduces downtime and repair costs
- Slows the natural degradation of diesel fuel caused by exposure to oxygen
- Prevents corrosion-caused leaks, blockages and breaks in metal parts
What It Does
Reduces gum and varnish buildup and contains components to extend the storage life of diesel fuel.
How You Benefit:
- Extends storage life of diesel fuel by 3-6 months
- Tolerates temperature extremes
- Increases injector life and optimizes combustibility
Ag Partners provides dependable energy solutions for farms, fleets, construction companies, municipalities, manufacturers, and other commercial operations. Whether you need transport loads, bulk fuel delivery, lubricants, or DEF, our experienced team delivers the products and service needed to keep your operation running efficiently.
Through our Cenex Lubricant Terminal (CLT), we offer bulk delivery of premium Cenex products, including:
We also supply Diesel Exhaust Fluid (DEF) in a variety of quantities to meet your needs:
Backed by trusted Cenex products, reliable delivery, and local expertise, Ag Partners is committed to helping businesses maximize equipment performance, reduce downtime, and keep operations moving.
You’ve made a huge investment in your equipment and we understand that keeping your equipment running at peak performance is critical to your business. That is why we offer the Cenex Total Protection Plan® Warranty. A comprehensive risk management tool for your operation that keeps you in the field and provides you peace of mind. 
For more information, contact one of our Certified Energy Specialists
Perry Smith: 785-548-5017
Wade Smith: 785-294-2091
Tyler Cameron: 785-850-8459
Brian Wheeler: 816-804-1392
Avery Suthers: 417-291-0832
Weston Smith: 417-850-9976
From 2021-2024, a portion of sales from every gallon sold at our fuel pump locations was donated back to organizations in the surrounding communities, totaling over $20,000. Recipients changed annually, alternating between school and community organizations.
2024: Northeast Kansas Arts Foundation, Centralia Community Library, Horton FFA, Axtell Eagle Booster Club, Nemaha County Fair Board, Hiawatha Elementary PTO
2023: Axtell FFA, Centralia FFA, Doniphan West FFA, Hiawatha FFA, Nemaha Central FFA, Bern School Activities Complex
2022: Nemaha County STEP Foundation: Seneca Community Fund & Corning Community Fund, Jason Adams Memorial Trap Shoot, HOPE Brown County, Axtell PRIDE, Axtell Economic Development Corporation
2021: Nemaha Central Booster Club, Sts. Peter & Paul Schools PTO Booster Club, Hiawatha Red Hawks Booster Club, Axtell Eagles Booster Club, Centralia Panther Booster Club, Doniphan West Mustang Booster Club.
