ALTUS 4T Synth is a premium synthetic motorcycle oil designed for both air and water-cooled four-stroke engine bikes, making it especially ideal for Harley-Davidson motorcycles. Crafted with high-quality base oils and advanced additives, it ensures optimal lubrication, superior engine cleanliness, and excellent friction control under all operating conditions. This oil is highly effective for use with or without a wet clutch, providing reliable performance across various riding scenarios.