A Technologically Superior Single Grade Engine Oil Designed for Diesel EnginesLE's Monolec® GFS Engine Oils are a family of SAE 20W through 50 straight-grade engine oils formulated for extended drain service in on-road, off-road and marine diesel engines. They contain Monolec®, LE's exclusive wear-reducing additive, which has proven to reduce wear by 24.2% in radioactive wear tests.
Lubrication Engineers operates under an ISO 9001 Certified Quality System.
