My question to the dealer, "Why isn't it in the manual? and with the price involved I figured it was a scam too. I'm not burning deisal here.

 

I believe this question is relevant to this thread, so I'll plop it in. I am coming up on the time when I do annual maintenance on my 2005 5.4 F150 truck, with 81,000 miles on it. I use a can of Seafoam in my fuel tank every 6 months (as well as the Amsoil fuel system cleaner fluid). I have seen multiple threads of using Seafoam in other ways, in other forums , but my question is: would this be helpful in a truck with 81,000 miles on it?

If so, is this the correct usage? (please correct where I go wrong here.)

1/3 can added to the motor oil 500 miles before changing it out (also, going from 5w-20 to 5w-30 this time around as well.)
1 can in the fuel tank (do this on a regular basis anyway...)
1/3 can into the throttle bottom, let it soak and then start up (2 questions here, will this step really benefit me? What are the risks to other components in cleaning the internal engine this way?)

Thanks in advance to any and all feedback (if this has been answered already, just add the URL please......) I apologize if this is a rookie set of questions....

 

Yes! I've being trying to find the "correct" way to seafoam an engine, and get different answers every time.