Full Synthetic Diesel Engine Oil
CountryMark Advantage™ Full Synthetic Heavy Duty Diesel Engine Oil is engineered for hard-working diesel engines. This unique formulation offers outstanding wear protection, oil consumption control and extended-drain technology. Available in SAE 5W40
Key Features
Extended Drain: Designed with advanced technology which extends oil drain intervals, improves soot control, provides faster lubrication during cold starts and maximizes total engine performance.
Improved Fuel Economy: Delivers greater than 2 percent fuel economy over conventional oils under all driving conditions.
Additive Technology: Delivers exceptional low-temperature flow properties, oxidation stability, viscosity retention and deposit control helping to enhance engine protection. Superior additive technology also provides added varnish and sludge protection to keep engines clean by minimizing deposit formation and significantly better soot handling capability than other oils.

Synthetic Blend Diesel Engine Oil

CountryMark Advantage™ Synthetic Blend Heavy Duty Diesel Engine Oil is uniquely formulated to offer better performance than API CJ-4 lubricants and it is designed to help meet latest government regulations requiring improved fuel efficiency performance plus it provides enhanced protection against viscosity loss due to shear and improved oil aeration. This distinctive formulation offers outstanding wear protection, oil consumption control and extended-drain technology. Available in SAE 10W30.
Key Features
Exceptional Wear Protection: Minimizes soot-related abrasive wear and offers outstanding cylinder, bearing and wear results. Enhanced soot control reduces engine wear and extends engine life.
Enhanced Performance and Extended Drain: Designed with advanced technology which extends oil drain intervals, improves soot control, provides faster lubrication during cold starts, and maximizes engine performance.
Exceptional Properties: Improved oxidation protection and aeration control. Outstanding cross-head and injector screw weight loss and exceptional bore polish and cylinder wear results.
Heavy Duty Diesel Engine Oil

CountryMark Advantage™ Heavy Duty Diesel Engine Oil is engineered for hard-working diesel engines and offers better performance than API CJ-4 lubricants. It is formulated to help meet latest government regulations requiring improved fuel efficiency performance plus it provides enhanced protection against viscosity loss due to shear and improved oil aeration. This consistent formulation offers outstanding wear protection, oil consumption control and extended-drain technology. Available in SAE 15W40
Key Features
Exceptional Wear Protection: Minimizes soot-related abrasive wear and offers outstanding cylinder, bearing and ring wear results.
Enhanced Performance and Extended Drain: Designed with advanced technology which extends oil drain intervals, improves soot control, provides faster lubrication during cold starts, and maximizes engine performance.
Exceptional Properties: Improved oxidation protection and aeration control. Outstanding cross-head and injector screw weight loss and exceptional bore polish and cylinder wear results.