In contrast, the best motor oil for high mileage cars contains seal conditioners that swell aged rubber gaskets and bushings. The Long-Term Benefits of Proper Care.
Choosing the Right High Mileage Oil Viscosity for Your Engine
If the engine has been burning oil, check the PCV valve; a clogged valve can create pressure that forces past seals, negating the benefits of the new oil. High mileage vehicles demand a specific level of care, and selecting the correct lubricant is the single most effective way to maintain performance.
How to Choose the Right Product Selecting the right product requires looking past the marketing claims and focusing on the specifications that match your vehicle. They hold their viscosity better under high temperatures and resist breaking down, which is essential for engines that have accumulated significant use.
Choosing the Right High Mileage Oil Viscosity for Your Engine
Anti-wear additives like zinc dialkyldithiophosphate (ZDDP) create a protective layer on camshafts and lifters, preventing metal-to-metal contact during the initial startup phase. When performing an oil change on a high mileage vehicle, consider replacing the drain plug gasket to prevent seizing.
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