Ensure your heavy-duty engines run smoothly with Mystik 5 Gal JT-8 SHD 15W40 CK-4. This synthetic blend engine oil is formulated to provide superior protection and performance in challenging service conditions. Ideal for use in trucks, farm and construction equipment, and stationary engines, it exceeds API CK-4 requirements, ensuring long engine life and efficient operation. The 5-gallon container offers ample supply for extensive use, making it a reliable choice for maintaining your equipment.