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Don't fight the system. Just take it back and exchange it. If you insist on using it consider using one quart of it per oil change. These modern engines have very close tolerances.
Actually the EcoBoost engines call for 5W-30 so I assume you have the Normally Aspirated 3.5. About the only difference you might see is a very slight decrease in fuel mileage. I think you'll be fine.
07-20-2016, 10:04 PM
