Dunno. I don't use it. There are better products out there IMO, like Techron, Berrymans or Gumout. They have PEA which is the best cleaner you can buy and all, I believe, have a UCL. Seafoam last I checked did not.
If you're wanting it for the fancy straw, you could just disconnect the intake hose at the airbox or at the throttle body and have a friend gas the engine while you spray. You'll likely get a check engine light but that should go away once you put everything back together. Otherwise, just dump a bottle into the tank..unless you have GDI, in which case you'll need to introduce via the intake. That'll get your valves, piston tops and injectors cleaned.
Last edited by Mad_Hatter; 05/26/19 10:21 AM.