Q: Can you mix different engine oil?

asked by on November 07, 2017

I have been told not to mix synthetic engine oil and Conventional motor oil together in a engine.Is this true?
My car has an automatic transmission.

You can mix synthetic and conventional (mineral) oil in any ratio that you desire. If you were told by anyone not to do that, simply ask him or her for the documentation, as published in a reputable automotive technology journal or in a journal dealing with tribology, that says that you can’t do that. The most important factor is that whatever you mix yields the correct viscosity specified for your engine and, as well, the oil must have the required API (or other agency) certifications as specified by Ford. If you need repair or maintenance, for example an oil and filter change, please keep YourMechanic certified professionals in mind. If you have further questions or concerns, do not hesitate to re-contact YourMechanic as we are always here to help you.

Was this answer helpful?
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing

Get a quote

What others are asking

While turning and parking my steering wheel feels heavy

Hi and thanks for contacting YourMechanic. Check the power steering fluid level and make sure that it is full. Also, look at the fluid color and see if it is clear or dark. If the fluid is dark, then the...

How much does it cost to repair my antifreeze leak

Anytime you see a coolant leak under the vehicle you know you have a leak but the location is not known. You will need to have the cooling system pressure tested to see where the leak is coming from. It...

Charging system

I would suggest having the alternator checked to determine if it is receiving the proper amount of voltage from something called the voltage regulator. The voltage regulator regulates the charging voltage that the alternator produces, keeping it between 13.5 and...

Related articles

A Buyer’s Guide to the 2012 Ford Fusion Hybrid
The The 2012 Ford Fusion Hybrid is a really great choice for anyone looking for a mid-size sedan. Not only does it boast plenty of room for people and cargo, but it also has a good amount of power and...
The Best Used Cars to Buy If You’re an Interior Designer
As As an interior designer, you need to transport a great many different items, including fabric, paint and wallpaper samples and sometimes even furniture items. You probably don’t handle overly large loads very often, and when you have to, you’ll...
The Top 5 Selling Cars in Kansas in 2012
Kansas Kansas sees a varied climate with all four seasons, which means drivers in the area choose a variety of vehicles. In years past, some of the front-runners have included the Ford F-150, Buick and Toyota Camry. 2012’s top five...