I also used a can of seafoam, but threw it ino the engine directly when changing the oil. THrew in half a can and ran the car for 20 minutes. Gunned the throttle a few times. I then threw in the other half with the new oil. All just to get any gunk in the engine.
I've read about seafoam in the fuel system, but I"ve used that in the past and never felt a discernible difference. LIke any other fuel addiitve if used in the tank,for me. The BG 44k though, noticeably improved idle in during that tank full. Seafoam in the engine gave me piece of mind in clearing out engine gunk. BG cleared out the fuel system gunk.