In the demanding world of heavy-duty transportation and equipment operation, engine oil selection stands as a critical decision that influences performance, longevity, and operational costs. Among the numerous viscosity grades available, 15W40 has established itself as the preferred choice for fleet managers and heavy equipment operators worldwide. This prominence stems https://www.fleetguard-filtrum.com/resources/blog/why-is-15w40-engine-oil-the-best-choice-for-heavy_duty-vehicles