Superior Single Grade Oil Extends Drains in Diesel Engines

Monolec® GFS Engine Oils are a family of SAE 30 through 50 straight-grade engine oils formulated for extended drain service, primarily in off-road diesel engines. They contain Monolec, LE’s exclusive wear-reducing additive, and are specified mostly for engines but are also sometimes used in industrial applications, such as air compressors.

Unit of Measure


Available Container Size

N/A 275 gal disposable tank

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Beneficial Qualities

N/A Technologically Superior
  • Contains high quality base fluid for excellent oxidation resistance and film strength
  • Keeps engines clean with exceptional detergency
    • Controls formation of deposits in piston ring zones and valve areas
  • Protects against rust and corrosion
Long Lasting
  • Exhibits excellent oxidation stability and detergency
  • Delivers longer effective oil life than ordinary engine oil
    • Extends drain intervals
    • Reduces oil consumption
Available SAE Grades
  • 30 (8430)
  • 40 (8440)
  • 50 (8450)

Performance Requirements Met or Exceeded

  • API-SAE Service CF/SJ(Unlicensed)
  • Caterpillar TO-2
  • CCMC D-4, D-5
  • DB 226.0
  • DB 227.0
  • Detroit Diesel Allison C-4
  • Ford ESE M2C-153-E
  • GM 6094M
  • Mack EO-K
  • Mack EO-K/2
  • MIL-L-2104E
  • MIL-L-46152E
  • USDA H2
  • VW 501.01

Asset Reliability Solutions

N/A Reliability Solution Products

Physical Characteristics - Typical


N/A Red

SAE Grade

N/A 50

Customer Testimonials

Customer Testimonials

N/A 8450 BP Racing
8450 Larry Gilkison