Can I use Sea Foam to start a 1984 Cadillac that last ran a long time ago? [SOLVED]

Hi Frank,

Thanks for the question!

The short answer is you’ll want to drain all the old fuel, and add fresh fuel with a high concentration of Sea Foam. The Sea Foam will help dissolve any fuel gum and varnish in the fuel system.

Check out this answer to a similar question for a step-by-step of what you’ll want to do: https://seafoamworks.com/questions-and-answers/the-best-way-to-remove-gasoline-from-a-car-that-hasnt-been-run-solved/#:~:text=Once%20the%20tank%20is%20empty,make%20it%20to%20the%20chambers.