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Are All Synthetic Motor Oil Brands the Same?
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.
Are All Synthetic Motor Oil Brands the Same?
I have two questions. I want to change to synthetic oil.  Are all major brands of synthetics the same? I can't find the change interval for Mobil 1 synthetic. Thanks.
-- Stanley Martinez, Broomfield, CO
All major synthetic brands are not the same; you can expect formulations to differ from one to another.  We would recommend going with the synthetic motor oil that meets the specifications noted in your owner’s manual. There is a high likelihood that Mobil 1 would have an oil for your needs.  Mobil 1 will work with the oil change interval that you think best fits your car and driving conditions. Once again, a good start is your owner’s manual especially if your car is under manufacturer’s warranty.  Mobil 1 Extended Performance is guaranteed by ExxonMobil for 15,000 miles.
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