Engine Oils

FS Engine Guard Full Synthetic SAE 0W-20, 5W-20, & 5W-30

FS Engine Guard Full Synthetic premium motor oil is formulated with a full synthetic base oil, a shear-stable viscosity index improver and is engineered with an advanced detergent and dispersant package to provide excellent engine cleanliness along with protection against low speed pre-ignition (LSPI).

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FS Suprex 15W-40, 10W-30, 10, 20W-20, 30, 40, & 50

FS Suprex is designed for heavy-duty two-stroke and four-stroke diesel engines found in farm machinery, construction equipment, marine, and over-the-road use. It is blended using specially selected, high quality base oils and additives providing excellent detergency, dispersancy, oxidation stability, rust/corrosion prevention, and foam suppression.

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FS Low Ash Severe Duty SAE 40 Oil

FS Low Ash Severe Duty SAE 40 Oil is a premium, low ash natural gas engine oil formulated for severe engine conditions in renewable energy and clean fuel applications.

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FS Suprex Gold HFE SAE 10W-30

FS Suprex Gold HFE (High Fuel Economy) 10W-30 is an API FA-4 premium heavy duty engine oil formulated with advanced technology to provide superior engine life and improved fuel economy for on highway applications. 

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FS Railroad Engine Oil SAE 40 & 20W-40, 9 TBN

FS Railroad Engine Oil is formulated to provide year round lubrication in 2-cycle and 4-cycle, low and high horsepower, turbocharged, railroad, marine, and stationary medium speed diesel engines requiring zinc free lubrication.

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FS Engine Guard 5W-20, 5W-30 & 10W-30

FS Engine Guard Motor Oils are formulated with synthetic and highly refined conventional base oils, a shear stable viscosity index improver and an advanced detergent and dispersant package to provide excellent engine cleanliness and protection against low speed pre-ignition (LSPI).

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FS Engine Guard SAE 20W-50

FS Engine Guard SAE 20W-50 is formulated with highly refined base stocks, a shear stable viscosity index improver and utilizes an advanced detergent and dispersant package to provide excellent engine cleanliness.

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FS Non-Detergent Engine Oil 10W, 20 & 30

Quality non-detergent motor oil is recommended for use in applications that specify non-detergent oil. This product is suitable for older, pre-1964 passenger cars that do not require high performance motor oils.

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FS Low Ash Natural Gas Engine Oil

FS Low Ash Natural Gas Engine Oil exceeds the warranty requirements of engine manufacturers Caterpillar 3600 Series, Caterpillar 3500 series, Waukesha 7044, and Waukesha 7042.

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FS Ashless Natural Gas Engine Oil

This product has been specially formulated for the most severe natural gas applications in all makes of natural gas fired engines. It is primarily for use in all 2-stroke applications including: Cooper Bessimer, Clark, Ajax and Superior.

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FS Engine Guard TC-W3 Two-Cycle Engine Oil

One oil for all of the two-cycle equipment in your garage / shed / dock. FS Engine Guard Two-Cycle TC-W3 is an outboard engine oil certified by the National Marine Manufacturers Association (NMMA).

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GROWMARK, Inc. 1701 Towanda Avenue
Bloomington IL 61701
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