K 2500 Truck 4WD V8-6.6L DSL Turbo VIN 1 (2002)
Engine Oil: Fluid Type Specifications
Engine Oil
API Classification ................................................................................................................................................................................................. CI-4, CH-4
Above 0° C (32° F) ................................................................................................................................................................... 15W-40 (preferred) 10W-30
Below -18° C (0° F) .................................................................................................................................................................... 5W-40 (preferred) , 0W-30