Mobil 1 does not recommend mixing its synthetic oils with other brands or types of oil. Mixing different oils can lead to compatibility issues and may affect the performance and protection that Mobil 1 products provide. Different oils often have varying additive packages that are designed to work specifically with their own formulations. When these oils are mixed, the beneficial properties may be reduced, leading to a decrease in lubrication performance and potentially causing engine wear over time.
For best results, it is advisable to stick with Mobil 1 products for refilling or topping off oil levels. This ensures that the engine receives consistent protection and performance. If you have specific questions or unique situations, the current Mobil 1 webpage may have additional guidance or resources available to you.
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