Can I safely use Marine PRO in my vehicle without hurting my car’s engine? [SOLVED]

Thanks for the question, Jim! Yes, you can use Marine PRO in a car. It won’t hurt anything and will still do a good job cleaning up the entire fuel system, just like Sea Foam Motor Treatment.

One tip: I like to wait until the tank is low (1/4 -1/8 tank), add the whole 20 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.