Can I use Sea Foam with Guaranteed to Pass at the same time? [SOLVED]

Thanks for the question!

Yes, you can use Sea Foam and Guaranteed to Pass at the same time. You can use Sea Foam with any other additive or treatment.

Note: I’d recommend adding a full can of Sea Foam High Mileage when the tank is low, and then driving until almost empty before refueling. A higher concentration works better and faster to clean fuel gum and varnish, which is often the root cause of performance and emissions-related issues.