If your vehicle exhibits symptoms such as blue exhaust smoke, a consistent drop in oil level between changes, or slight rattling noises on startup, it is likely time to switch. High mileage oil exists for one primary reason: to address the specific needs of engines that have accumulated significant distance.
The Primary Reason High Mileage Oil Exists for Your Engine
Using a product with the API starburst and the specific mileage designation ensures the chemistry is matched to the engine's mechanical condition. These filters often feature an increased dirt-holding capacity and additional anti-wear additives.
Identifying When Your Vehicle Requires This Specific Grade Manufacturers generally define a vehicle as "high mileage" once it crosses the 75,000-mile threshold. The Economic Argument for High Mileage Maintenance.
The Core Reason High Mileage Oil Exists for Your Engine
Modern engine manufacturing tolerances are incredibly tight, and the seal conditioners present in these oils can sometimes interact negatively with new seals, causing performance issues. In reality, the viscosity is identical to standard synthetic oils; the difference is in the additive package.
More About High milage oil
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