Can I add 2 oz of Sea Foam per gallon to a full 10 gallon tank for the first time in a 2001 Mazda MX5? [SOLVED]

Yes, you can add Sea Foam in that amount in a 2001 Mazda MX5.

That said, if this is the first time you’re adding it, I’d recommend adding it to a low tank to create an even stronger cleaning concentration. I like to wait until the 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.