Monarch Synlube Diesel Supreme Plus 5W40 engine oils formulated for extended drain service in the most demanding applications requiring CK-4 additive chemistry in synthetic based oils. At the same time, this oil provides long drain service in conventional engines by promoting longer engine life and reduced component wear by providing higher oil film thickness, better wear performance and improved oxidation control at higher temperatures. Monarch Synlube Diesel Supreme Plus engine oils are a fully synthetic, high performance, all-season diesel engine oil developed for all types of automotive fleet equipment, including on- and off – highway vehicles and farm equipment with heavy-duty diesel engines.
