Using AMSOIL synthetic motor oil in your vehicle is a smart way to maximize longevity and performance. AMSOIL leads the lubrication industry by investing heavily in product research and testing. But one day you might find yourself in a pinch, like realizing your oil level is low while stopped at a remote gas station with limited options on the shelf. Let’s be honest – it’s happened to all of us. So, can you mix AMSOIL with other oil? The short answer is: “Yes, you can. But it’s not ideal.”
Mixing AMSOIL With Other Oils Dilutes The Benefits
One reason it’s not a good idea to mix AMSOIL with other oil is that AMSOIL engineers carefully formulate lubricants to protect their intended applications. Diluting AMSOIL products with other brands will reduce their benefits and potentially alter their chemistry enough to reduce protection and performance.
For example, AMSOIL Signature Series is fortified with a heavy treatment of detergent additives, helping it deliver 28% more acid-neutralizing power1 than Mobil 1,* helping engines to stay cleaner, longer. Therefore, if you dilute Signature Series with another brand, you also dilute the additives, reducing performance.
Can I Mix Conventional Oil With AMSOIL?
While performance will suffer, it will not damage your engine to add conventional motor oil to your engine.
That’s because you can safely mix synthetic and conventional oil. In fact, synthetic-blend motor oil is simply conventional and synthetic oil already mixed for you. But, barring an emergency, it’s not a great idea to mix oil types, and the resulting blend will not support an extended oil change.
Even though it’s safe to top off an engine that normally uses AMSOIL synthetic motor oil with conventional oil, we recommend changing the oil at your earliest convenience. In fact, AMSOIL does not support extended drain intervals where oils have been mixed.