I so need to do this! To bad I am aboiut 2k away from an oil change. I bought an '03 just over a year ago and came across the site a few months back. Not sure how the original owner maintained the truck, but it seem pretty clean underneath. (other than a mystery coolant leak..for a different thread.)
I'll let you all know how it goes when I get paid next week.
So I can still do this in just the intake ans fuel tank right, or is it best to poor a half/full bottle into the oil as well? I have over 108,000 miles on it and NEED to do some mods. Loving the site!