Love the Seafoam.
Cleaned the carbon out of my 07 5.9L Cummins.
Let me edit, I bought a used 07 3500. A month or so after it bent a pushrod. Warranty repair. On they're test run it bent another. Fixed it. I asked why? Dodge told me because the owner before my must have idled a lot and the engine was built up with carbon and sticking valves. They wanted to hook it up ro some system they had and run a cleaner through my engine.
AT MY COST and it was expensive.
Nope. I bought Seafoam and dumped a whole bottle in the tank. Next tank got another bottle. About half way through that tank I was on the highway, as usual, and my engine coughed and sputtered and freaked me out then ran smoother than it has since I bought it. Sold the truck a year later still running well. Lucky me.
Cleaned old motorcycle carbs.
Took old carbs off an XS1100 i had sitting outside for a few years with no air box attached to the carbs and no exhaust attached. Just a parts bike. Snow, rain, dirt allowed to do what it wanted. Pulled them off, sprayed with carb clean and put them on my running XS1100. Did not dismantle the four carbs. Half can of Seafoam in the tank and hit the highway. Ran perfect. Lucky again.
Fixed my TPS on my 01 Ram 5.2L. Truck idles now anyway. Carb cleaned the throttle body and dumed a can of Seafoam into the running engine through the throttle body. Smoked like mad, loved it. Stalled it out with the Seafoam and let it sit half hour. Fired it up. Smoked awesome. Has yet to have a bad idle since. Before about once a week it wouldn't idle. Had to drive it a mile or so and then it would run ok. Has not given me any issue in the last few months. Lucky again.
I use it in everything.
Never put it in the oil though. Just fuel tank.