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SILBOIL PRIDE ULTRA DIESEL 15W-40 CI-4/SM Premium Full-Synthetic Engine Oil is blended from premium synthetic base oil and additives. This full-synthetic oil guarantees better protection and the best lubrication under all conditions and at different temperatures. It exceeds CI-4/SM standards by providing superior wear protection along with enhanced fuel economy that prevents sludge build-up in the engine. Ideal for modern cars, SILBOIL PRIDE ULTRA DIESEL delivers smooth, quiet rides and extends engine life. Choose SILBOIL PRIDE ULTRA DIESEL for reliable, high-performance engine care and a consistent smooth ride.