Sea foam sounds like a newer version of marvel mystery oil. We had a member a few months back that had a 3 valve 5.4, 2006 I think. Well not knowing how sensitive the cam phasers were on those motors, I'd suggested he put in about a half a small can to unstick what was possibly causing his top end ticking. Well all hell broke loose, he overdid my recommendations, and on top of the marvel, he dumped in 1/2 quart of atf. I had told him one or the other. Luckily he swapped out the cam solenoids at front of motor, along with an lof, and brought his racket back to normal. I don't usually recommend carbon burn off as it can dislodge chunks that can get stuck, or cause damage. If you do decide to sea foam or use any strong carbon burners, be sure to drop oil/ filter immediately after, as your dropping those chemicals into your oil. But you all knew that already.
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