KLONDIKE SAE 10W-30 FA-4 Synthetic Blend Heavy Duty Engine Oil is a premium, high-performance lubricant engineered specifically for the next generation of over-the-road diesel engines. As modern North American original equipment manufacturers (OEMs) shift toward more efficient engine designs, this synthetic blend formulation provides the precise protection required to maximize service life while meeting stringent fuel economy targets. The standout feature of this oil is its compliance with the API FA-4 service category. Designed to reduce greenhouse gas emissions and enhance efficiency, API FA-4 oils typically offer a significant fuel economy improvement of 1% to 2% compared to standard API CK-4 oils of the same viscosity. This makes it an essential choice for fleet operators and owner-operators looking to lower their total cost of ownership without compromising on engine durability. Formulated with high-quality synthetic base stocks and advanced additive technology, KLONDIKE SAE 10W-30 FA-4 offers exceptional shear stability and oxidation resistance. It maintains a consistent protective film even under high-temperature, high-load operating conditions, effectively minimizing engine wear and preventing the buildup of harmful deposits. By choosing this factory-recommended viscosity grade, you ensure your modern heavy-duty engine operates at peak performance while benefiting from the superior fuel savings and environmental compliance demanded by today’s trucking industry.