Dowler-Karn, a division of McDougall Energy Inc. has supplied homes and businesses in southwestern Ontario with unmatched service and a complete range of energy products since 1943. Every day, we deliver Esso gasoline, diesel fuel, propane, and Mobil lubricants to over 19,000 residential, commercial, and industrial clients.

Headquartered in St Thomas, Ontario, with 7 branch offices and 8 fuel centres, Dowler-Karn is a local industry leader, dedicated to reducing our carbon footprint, promoting sustainable practices and conserving resources. Combined with McDougall Energy’s more than 70 years of experience, our customers have peace of mind in knowing we provide reliable, high-quality products and services, as a trusted community partner.