Question: Is It OK To Mix High Mileage Oil With Regular?

Is high mileage oil thicker or thinner?

A: Yes.

This is a practical method to improve oil pressure in an older, high-mileage engine.

The slightly thicker oil film from the heavier base weight oil — 10W — can help protect worn engine bearings as well..

Can I mix 5w30 and 10w40?

As posted above, mixing 5w30 with 10w40 will give you an oil that performs somewhat better in the cold than 10w40, but less good cold than 5w30, and that has a viscosity a bit higher than 5w30 but a bit lower than 10w40. … Mixing different oils will not improve the performance or efficiency of the engine in any way.

Is it OK to mix engine oil viscosities?

It is always advisable to not mix motor oil brands, however, different viscosity grades of the same brand motor oil are compatible. … But there’s absolutely no danger about incompatibility resulting from mixing engine oils,” Miller says. “We’ve tested all of our grades and brands, and we haven’t observed any problems.”

Can you mix different engine oils?

The good news is that mixing different types of oil it will not harm your engine in any way in the short run. Most synthetic and semi-synthetic engine oils are based on regular oil and are compatible. … Now, as far as different grades are concerned, mixing between them isn’t something that will damage your engine either.

Can you mix high mileage synthetic oil with regular synthetic oil?

According to Mobil Oil, it should be fine to mix oils. … Many oils are a blend of natural and synthetic oils. So, if you are low on oil, don’t be afraid to add a quart or two of synthetic oil if you are using regular oil or even regular oil if you are using a synthetic.

What happens when you mix synthetic and conventional oil?

Mixing these oils is generally not the best idea. Mixing conventional and synthetic oils will actually decrease the performance qualities you enjoy from synthetic oils alone. Conventional oils will ruin the cleaning and lubricating functions of the synthetic oils because their chemistry is completely different.

Is 5w30 good for high mileage?

Furthermore, high-mileage 5W-30 motor oil is specially formulated for late model vehicles or newer vehicles with over 75,000 miles/120,000 kilometers. High mileage motor oil, with its unique additives and formulation, helps to reduce oil burn-off, and helps prevent oil leaks that may occur in older engines.

Can you mix 5w30 and 0w20?

In my opinion it wouldn’t hurt a thing if you mixed some 5W30 with 0W20. In fact you could probably use 5W30 once the warranty has expired (or maybe before).

Does high mileage oil make a difference?

High-mileage oils have ingredients to take care of older engines, like conditioners, seal swells, antioxidants, detergents and wear or friction additives. … The higher-mileage oils are formulated with seal conditioners that increase flexibility and restore shape, which can help prevent leaks in the long run.