Hi, I just tried Sea Foam on my '99 Ford 4.2L E150 with 50K miles.It did not smoke at all!?Now,I'd like to spray some Deep Creep(have it)in the TB intake. The thing is I just changed the plugs/wires & oil. Can I safely use the Deep Creep and not change the oil(M1/5-40) or affect the new plugs? There are no real performance issues,other than a little sluggish at the top end.Thanks.
Ron
Ron