[4x4r]

I rarely post but just figured i'd say, that my 2001 4x4 f150 with the 4.2 147,000 miles has been smoking after start up lately with 6 qts of oil addded. I never had the owners manual since day one. I always added 5qts of oil and it was perfect - then i realized i was always a quart low. well when i added the extra qt it would only smoke at start up. I was prepared for the cool v8 swap or a new set of heads or a rebuild... I used carquest brands engine flush and now it runs perfect, NO SMOKING and i'm back to using 6qts of oil as required. I doubt that 5qts ever affected anything because i changed the oil at 3,000 miles ALWAYS. must have been the varieties of cheap oils that sludged up my rings etc... or just coincidence that it started to smoke a little at start up around the same time i read it takes 6qts.. but either way my trucks been fine since i used the engine oil flush.