This may have been asked here before but the guys at my oil change place put motorcraft 10w-30 in my 6.7 the other day and I'm a little nervous if it is right oil or not. It didn't say super duty on the jug anywhere and it wasn't cj-4 either but the guys there told me this was oil they were putting in 6.7s coming through there. I think they even put 15 qts but am not sure and I park on side of street where truck is leaning so I don't get accurate check on dipstick. Isn't it supposed to use 13?
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