Refined Fuels


SynEnergy has a proud history of customer service and reliability in providing quality CountryMark fuels and Lubes to our Farm and Commercial Accounts.

The CountryMark Refinery located in Mt. Vernon Indiana processes 30,000 barrels of local crude oil per day, operating 24 hours per day 365 days a year. CountryMark is a reliable supplier of market-leading energy products for farms, fleets and families in Indiana, Illinois, Kentucky, Ohio and Michigan.

SynEnergy Partners LLC

CountryMark sources local crude from the Illinois Basin, which includes southern Illinois, southern Indiana and western Kentucky. Transport trucks and a network of pipelines stretching 400 miles bring local crude oil into the refinery. Local crude oil that is locally refined provides a dependable source of domestic energy, which aides in domestic energy independence and security.

We are continually investing in state of the art fueling equipment from tank monitors to our fleet of trucks.

Products we supply


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SynEnergy Partners LLC continues to monitor COVID-19 around the clock under the guidance of our Global Crisis and Regional Incident Management teams, and we have responded as a company with compassion for those who may be affected as well as an abundance of caution to limit the spread of the virus.

We are also taking measures to ensure business continuity remains unimpacted during this time.