Keep your heavy-duty diesel engine running smoothly with this premium maintenance kit featuring 5W-40 synthetic oil and a genuine original filter. The T6 synthetic oil is specially formulated to provide outstanding protection for up to 15 years or 500K miles, delivering excellent performance in extreme temperatures and heavy-load conditions. This comprehensive kit includes 12 quarts of the advanced synthetic oil along with a high-quality original oil filter designed specifically for optimal filtration and engine protection. The full synthetic formula helps maintain engine cleanliness and provides enhanced wear protection while offering improved fuel economy potential compared to conventional oils. Perfect for fleet vehicles and hard-working diesel engines that demand reliable, long-lasting protection.