Personally, I think it's snake oil. And to be honest, I really don't believe there's a magic oil out there for modern engines. I think you should focus more on viscosity. I think that will be the best for your rig. I mean hell, my 96 lasted a quarter million miles on walmart special oil, and while my father owned it (the first 200,000 miles), it only got 5 oil changes. Maybe it woulda lasted longer if it used a different oil and routine changes, but a quarter mil seems to be right around the life expectancy of those 460's. So with results like that, do oil changes matter, sure...might help you last another 50 or so thousand miles. Personally, I think the hype that goes along with swapping oil every 3,000 miles is bogus. My grandfather who was a Ford Master mechanic for 30 years felt the same way, he said he believed 15k between changes and you'd be fine. Might be different with the newer engines since the late 90's, but prior to that, I'm not convinced every 3-5k is necessary.
^yea that's a little what i was thinking and about the 3000 mark i dont think so either, but what about if its a rig doing more than just driving around and it's duty is doing tough jobs?
^yea that's a little what i was thinking and about the 3000 mark i dont think so either, but what about if its a rig doing more than just driving around and it's duty is doing tough jobs?
When you change your oil is your preference. Usually, I do it once a year or 10k, whichever comes first, regardless of use. Typically, it's said the more extreme the use, the more frequently you're supposed change.