Premium Dieselex-4

Discover why those who hate downtime and demand performance chose to fill up with Premium Dieselex-4, CountryMark’s premium on- and off-road diesel fuel. It’s these four fuel benefits that bring hard-working CountryMark customers all they need to get the job done. Detergency to keep fuel injectors clean and minimize engine maintenance costs. Lubricity for wear […]

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Safety Data Sheets

Diesel Premium Dieselex-4 Number 2 Diesel ULS K-1 Kerosene Biodiesel B100 Thermalex ULS Gasoline PLUS Gasoline E85 Ethanol Ethanol Other DEF Propane […]

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Refined Fuels

Order 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 […]

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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.