Has anyone used Seafoam

[willtill]

It would be interesting to run an oil analysis before and after using the stuff to see if it makes any difference. Otherwise it's just speculation.

I'm planning on doing something similar. I've been using Bosch oil filters on my F6B, but they've become difficult to find around here. So at my last change I tried a Walmart Super Tech filter. I had the oil analyzed and will do the same at the next change. If the results are similar I'll stick with the much less expensive Super Tech filters. These get good reviews and are apparently made by Champion, who also makes Mobil 1 filters.

I'm still using the Honda OEM filters on mine. They sure have gotten pricey though; they're like $14.95 on Wingstuff.com

i did use Rotella on my last oil change though. I usually use the Honda synthetic.