MACK GO-J

The MACK GO‑J specification is the official technical requirement of the American heavy‑truck manufacturer Mack Trucks for engine oils, developed to provide long‑lasting engine protection under severe operating conditions. It calls for a minimum viscosity in the range 15W‑40 – 20W‑50, high oxidation resistance, controlled ash content, and the ability to withstand wear under high loads typical of diesel units in the Mack 7, 8 and 9 series. The specification covers both traditional non‑aftertreated diesels and modern engines with exhaust after‑treatment systems (DPF, SCR), while the oil meets low‑SAPS requirements that do not harm the catalyst. When selecting oil on XENUM.ua, the MACK GO‑J mark guarantees compatibility with these engines, preserves warranty and ensures optimal performance even on intensive routes. Newer approvals such as MACK EO‑M PLUS, EO‑N Premium Plus and others remain backward compatible, so products that meet GO‑J also satisfy the newer requirements.