Dowler Karn | Propane, Fuels & Lubricants Across Southern Ontario

Fueling Your Home

Comfort
you can
count on.

Propane is among the best fuel choices for your home – it’s versatile, inexpensive, and has a low environmental impact.

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Fueling your business

For equipment that
doesn’t take time off.

At Dowler-Karn we trust Mobil™ Lubricants to keep our customers processes and vehicles running smoothly.

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Fueling communities

Pull up. Fuel up.
Dowler-Karn 24/7
Fuel Access Centre.

Our 24-Hour Self-Serve Fuel Access Centres offer a reliable and convenient way for customers to fill up at the pumps. Fast and convenient, No cash or attendant required.

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Fueling your business

If your business
relies on fuel,
you can rely on us.

Dowler-Karn has Energy Solutions for Commercial, Industrial, Manufacturing & Fleet Operations.

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FUELING THE FUTURE

Dowler-Karn joins McDougall Energy Inc.

We are pleased to announce Dowler-Karn has officially joined McDougall Energy Inc. and Group of Companies as of February 28, 2022. We value our loyal customers across Southwestern Ontario and look forward to continuing to serve you as Dowler-Karn A Division of McDougall Energy Inc.

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Dowler-Karn is Southwestern Ontario’s trusted power supplier.


Dowler-Karn has been fueling communities since 1943. As a third-generation family business, we pair the latest technology with old-fashioned local service. We are proud to be an essential partner to all industries requiring energy. We listen to our customer’s needs and values while implementing premium service. We offer new digital fuel solutions, allowing our customers to efficiently manage energy products ranging from quality propane, Esso™ fuels, and Mobil™ lubricants. Our customer service is a benchmark, which is what sets us apart.

Headquartered in St. Thomas, Ontario, with over 180 dedicated employees across our eight branch offices and nine fuel centers, we support and supply products to over 18,000 residential, agricultural, commercial and industrial customers. We value our customers, and in return, our customers have come to appreciate us for our honesty, integrity, and commitment to the community.


Dowler-Karn has been a quality propane supplier with exceptional service to our customers since 1979.

As Southern Ontario’s #1 propane supplier, we will help re-fill for your backyard barbeque, or an agricultural, industrial, or home energy solution, we are able to meet all of your needs.

Fueling Your Home

Comfort you can count on.

Propane is among the best fuel choices for your home – it’s versatile, has a low environmental impact, and is competitively priced.

Learn More

Fueling Your Business

If your business relies on propane, you can rely on us.

From top to bottom your business needs to be operationally efficient, so you need a dependable fuel partner to help you save time and increase productivity.

Learn More

Fueling Communities

Pull up. Fuel up.
Dowler-Karn 24/7
Fuel Access Centres.

Our 24-Hour Self-Serve Fuel Access Centres offer a reliable and convenient way for customers to fill up at the pumps. Fast and convenient. No cash or attendant required.

Find a location near you

Fueling Your Business

Industry Solutions


Excellent supplier relationships lead to positive outcomes for businesses. Let Dowler-Karn bring our expertise to the table as a dependable and knowledgeable energy partner. We are committed to developing strong and successful relationships, just as we have done with a wide variety of industry-leading businesses across the region. We work with a variety of manufacturing facilities - as well as commercial and industrial operations.

Dowler-Karn Agriculture & Farming

Agriculture & Farming

We know the ins and outs of farming. Let us work with you to plan and implement energy solutions and delivery systems tailored to your operation.

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Dowler-Karn Auto Propane

A Fuel Supplier For Auto

Propane is a low-emission fuel, offering comparable engine performance, and is less expensive than gasoline. Switching your full fleet to propane-fueled vehicles is a sound investment that will show a positive return.

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Dowler-Karn Commercial & Industrial

Commercial & Industrial Fuel Supplier

Fueling your business is a top priority. The energy demands of a large-scale fleet operation or a manufacturing centre are different from the average business.

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News & Resources


Collaboration is a Customer Service Success Cornerstone

News

Collaboration is a Customer Service Success Cornerstone

On October 4, 2022 we hosted a great visit and tour at Dowler-Karn’s main Lubricants Distribution ...

Fuels Management is Prominent on the Minds of Many

News

Fuels Management is Prominent on the Minds of Many

Dowler-Karn has always strived to provide value by not only delivering industry leading products and...

A Training Spotlight

News

A Training Spotlight

In a world that is always evolving, with technology constantly becoming more and more important to o...

Show ‘N’ Shine in Support of Cancer Research

News

Show ‘N’ Shine in Support of Cancer Research

Providing the right equipment for the job is critical in promoting safe and efficient deliveries. Do...

Around the Community

News

Around the Community

Canada’s National Fire Prevention Week took place October 9th to the 15th 2022 with events and ope...

Supporting Vibrant and Active Communities

News

Supporting Vibrant and Active Communities

There was considerable excitement in communities across the region when we finally saw the loosening...

Heating Season Is Here

News

Heating Season Is Here

We all know friends or family members who wait as long as possible before adjusting their thermostat...

Helping our Communities Thrive

News

Helping our Communities Thrive

The pandemic created challenges for many organizations, but for charities and community organization...

Challenging Times Require Swift Action and Commitment to Support Customers

Business, News

Challenging Times Require Swift Action and Commitment to Support Customers

As an essential service, we have continued to provide timely and safe delivery of products and servi...

Preparation and Training are Keys to Success

News, Tips

Preparation and Training are Keys to Success

Dowler-Karn has always strived to provide support to our first responders, be it through onsite trai...

Canada’s Outdoor Farm Show

News

Canada’s Outdoor Farm Show

Dowler Karn’s Return to Canada’s Outdoor Farm Show Dowler-Karn is excited to once again ...

Congratulations to David Karn for Industry Honour

News

Congratulations to David Karn for Industry Honour

The Canadian Propane Association (CPA) announced their top industry awards at its 2022 Leadership Su...

Find a Dowler-Karn location near you:

Aylmer

26 Beech St.
Aylmer, Ontario N5H 1A1

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Chatham-Kent

24151 St. Clair Road
Chatham, Ontario N7M 5J2

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Dutton

11063 Currie Rd.
Dutton, Ontario N0L 1J0

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London

1980 Crumlin Road
London, Ontario N5V 3B6

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Lubricants Distribution Centre

40 Progress Drive
St. Thomas, Ontario N5P 4G5

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Sarnia Fuels/Lubricants

361 Gladwish Drive
Sarnia, Ontario N7T 7H3

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Sarnia Propane

1494 Plank Road
Sarnia, Ontario N7T 7H3

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St. Marys

1714 Perth County Rd. 163
St. Marys, Ontario N4X 1C4

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St. Thomas - Head Office

43841 Talbot Line, RR 3
St. Thomas, Ontario N5P 3S7

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St. Thomas – Fuel Centre

389 South Edgeware Rd
St. Thomas, Ontario N5P 4C5

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Tillsonburg

45 Spruce Street
Tillsonburg, Ontario N4G 5C4

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Windsor

5475 Dicocco Court
Windsor, Ontario N0R 1L0

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