I've never put Seafoam in my oil and I never will. Do you really want a solvent left in your oil? It should be changed within 50 miles at most. Also, remember that all of that carbon and sludge it's trying to break up has to end up somewhere. Much of it can end up stuck/burnt on your sparkplugs. Many people change their plugs after a Seafoam treatment.
Honda and BMW both recommend against using it.
There are a few horror stories on the net about adding it to the oil, or using too much too quickly.
2001 Ranger Edge Reg Cab 4.0 4x4, Factory 8.8 - 4:10LS -1989 Ranger Reg Cab 2.9 4x4
“The automobile changed our dress, manners, social customs, vacation habits, the shape of our cities, consumer purchasing patterns, common tastes and positions in intercourse”
Last edited by Bird76Mojo; 01-04-2011 at 03:13 PM.