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We run 5W30 in our '17 truck. If it was my truck I would run 5W30 as well. I'm sure there a reason why Ford went with a thicker oil later just like they did with the Eco Boost.
If your still under warranty, run the 5w20 that is recommended. If your out of warranty, run 5w30. Don't give them any reason to deny you coverage if you should need it.
If only Ford had thought to include such information along with the vehicle.
Had to chuckle at this comment...To be fair, owner's manuals for the past 20 years are stuffed so full of gobbledygook that it's getting hard to find the useful info. Ever try to find service info in a Volkswagen owner's manual?
But then with Ford, you can probably find the info on the oil fill cap. Since motorcraft brand oil at Autozone is about the same price as the other good oils it's actually one of the simplest maintenance items to get.
I use to change oil in everything at three thousand miles no matter what. So I finally committed to change my ways and make a minimum of five thousand miles from now on. I went five thousand miles and changing it this morning it was definitely dark. I noticed the dark hue of it coming out of the drain and the oil filter while unscrewing it. I'm not saying this means anything except that it will be dark at five thousand miles. From past experience the oil still looks new at three thousand miles so somewhere between three and five thousand miles I guess it turns.
Going forward I still will be sticking with five thousand mile oil change intervals.