Yes this was recommended to me by an old friend, and retired Ford mechanic years back.You can use dextron/ mercon, about a half quart or so. You can also use marvel mystery oil, good stuff. Either one is fine, they work to unstick valve lifters, piston rings, helps remove varnish/ gunk buildup. Leave in for about 250-400 miles. Drive your SUV easy, drop oil and filter. Hopefully it helps.
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