How much Sea Foam do I add to a half tank 2000 Monte Carlo SS? [SOLVED]

Good question, Jonas. Here’s what I’d recommend: wait until the tank on your Monte Carlo 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.