Mobil 1 Logo with trademark
Mobil 1 RacingTM
Car Care for a Better Ride

My Mobil
Discover the Benefits of Membership
Forgot your username or password?

YouTubeMobil 1 Merchandise
Mobil 1 Rewards
Ask MobilAsk Mobil
Is Adding ATF to Motor Oil Good Advice?
Ask Your Stickiest Question. . . Or ask us something you’ve always wanted to know about using our products. We’ll sort through all the submissions and present the best questions to our automotive experts. We'll share the questions and their answers here.
Is Adding ATF to Motor Oil Good Advice?
I have seen this advice before, and I have been following it for years. The advice is to add one quart of ATF to the engine oil every change. Would you please tell me if this right or wrong?
-- Suhail Hamamah, Glendale, CA
Today’s engine oils are specifically formulated to meet the needs of an engine’s complex operating conditions.  Automatic transmission fluids are designed for a completely different piece of hardware operating with its own unique needs. It is not recommended that these fluids be mixed.
Ask a QuestionAsk Mobil
Copyright 2005-2014 Exxon Mobil Corporation. All Rights Reserved. ExxonMobil Home | Site Map | Contact Us | Privacy | Legal