MACK EO-O Premium Plus

The MACK EO‑O Premium Plus specification is the official technical requirement of the American heavy‑truck manufacturer Mack Trucks for engine oils, developed to provide high engine protection under intensive loads and long distances. It calls for a minimum viscosity in the range 10W‑40 – 20W‑50, high oxidation resistance, excellent wear and corrosion protection, and a controlled ash level, allowing safe operation of both traditional diesel engines without after‑treatment and modern units with DPF or SCR. The specification is targeted at a wide range of Mack engines, including the Mack 6‑stroke series (e.g., Mack 13‑L, Mack 16‑L) and other heavy diesel blocks operating at high pressure and temperature. Oils that meet MACK EO‑O Premium Plus are compatible with low‑sulphur (Low‑SAPS) exhaust after‑treatment systems, ensuring the longevity of catalysts and particulate filters. When choosing XENUM products, such as DIESEL SYNTH 10W40, you receive a lubricant that also meets the newer MACK EO‑N Premium Plus approvals, maintaining full compatibility and warranty status for your fleet.