8W-40

The designation 8W‑40 according to the SAE J300 standard indicates a cold viscosity of 8 (ability to start at temperatures down to –35 °C) and a viscosity of 40 at 100 °C, providing a stable oil film across a wide temperature range. This viscosity is suitable for gasoline and diesel engines of medium and high power, including older passenger cars, trucks and off‑road vehicles, as well as high‑mileage engines that require a thicker protective oil film. 8W‑40 is often used in systems without a particulate filter (DPF) or with conventional catalysts, because it is not low‑SAPS and can increase wear in modern DPF systems. When necessary, you can switch to newer viscosities such as 9W‑40 or 10W‑40, which remain compatible with manufacturers' recommendations while preserving protection and performance. Choosing XENUM VRX GEN2 8W‑40 oil gives you a synthetic base, ceramic additives and stability that meet SAE requirements and guarantee the longevity of your engine.