About Us
Dowler Karn

Dowler Karn, A Division of McDougall Energy Inc.

About Dowler-Karn Limited

Dowler-Karn, A Division of McDougall Energy Inc., has been fueling communities in and around Southwestern Ontario since 1943. As an industry leading energy distributor offering quality  Esso™ fuels, and Mobil™ lubricants, they are proud to offer new digital fuel solutions that allow customers to efficiently manage energy products.

Headquartered in St. Thomas, Ontario, with over 180 dedicated employees across eight branch offices and nine fuel centers, Dowler-Karn supports and supplies products to over 18,000 residential, agricultural, commercial and industrial customers.

> Visit Dowlerkarn.com to learn more 

 Dowler-Karn Limited is Southwestern Ontario’s trusted distributor of quality energy products.


  • St. Thomas - Head Office
  • Chatham-Kent
  • Sarnia Fuels/Lubricants
  • Sarnia Propane
  • Windsor
  • Tillsonburg
  • St. Marys



  • Propane
  • Heating Oil
  • Automatic Delivery
  • Tank Monitoring


  • Commercial & Industrial Propane
  • Auto Propane
  • Propane for Business
  • Agriculture & Farming
  • Lubricants
  • 24 Hr. Fuel Access Centres


Contact Dowler-Karn

St. Thomas Head Office
(519) 631-3810 | 1-800-265-4342

Chatham-Kent Office
(519) 351-8000  | 1-800-263-0295

St. Mary's Office
(519) 229-63001-800-463-3902

Tillsonburg Office
(519) 842-48411-800-265-9325

Windsor Office
(519) 737-96351-877-770-7263


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