Is it safe to add two cans of Sea Foam to a full gas tank in my Accord? [SOLVED]

Good question. Yes, it’s safe to add a high concentration of Sea Foam to fuel. It’s made with 100% safe petroleum cleaning and lubricating ingredients and it’s okay to add multiple cans. In fact, adding a high concentration works much faster and better to clean than a low concentration.

However, I’d wait until the gas tank is low (1/4 -1/8 tank). Add the whole 16 oz can, and then drive for at least 10-20 miles before refueling. It’s safe to add a high concentration like that and it works very well for cleaning fuel residues and deposits.

You could add a second can at the same time (in a low tank 2-4 gallons of fuel).