API CJ-4

API CJ-4 is the latest category of the American API standard, created for heavy-duty diesel engines of commercial trucks, buses and off‑road vehicles with a displacement over 2.5 L. The specification requires high resistance to oxidation, protection against wear and corrosion at high temperatures and heavy loads, as well as minimal deposit formation on valves and pistons. CJ-4 calls for low‑sulfur, low‑phosphorus and low‑silicate (SAPS) formulas, making the oil compatible with after‑treatment systems – particulate filters (DPF) and SCR catalysts. Oils that meet API CJ-4 are suitable for engines that demand fuel economy and long service intervals, including Cummins, Detroit, DAF, MAN, Volvo and other models that comply with EPA 2010+ requirements. On xenum.ua you will find a product that meets these requirements, for example XENUM DIESEL SYNTH 10W40 E4/E6/E7/E9, providing reliable protection and stable operation even under harsh conditions.