This certification, established by General Motors, ensures the oil is compatible with the sophisticated emissions controls and the Active Fuel Management system found in modern GM engines. Maintenance Schedule and Best Practices.
High Mileage 2015 GMC Sierra 1500 5.3: Choosing the Right Oil for Longevity
The "5W" indicates a low viscosity when cold, allowing the oil to flow quickly upon startup, which is crucial for protecting engine components during the initial moments of operation. Dexos1 Certification: The Non-Negotiable Standard Beyond viscosity, the oil must meet the stringent dexos1 Gen2 specification.
Viscosity: The Cold Weather and Hot Weather Balance Viscosity, simply put, is the oil's resistance to flow. This engine features Active Fuel Management (AFM), a technology that deactivates cylinders during light load conditions to save fuel.
High Mileage 2015 GMC Sierra 1500 5.3 Oil Recommendations
3 is fundamental to the longevity and performance of your full-size pickup. Using an incorrect viscosity or an oil not meeting the required dexos1 specification can cause the lifters and actuators to rattle, leading to a noisy cabin and potential long-term damage.
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