How much Sea Foam in the oil of a Mazda 6? [SOLVED]

Thanks for the question, Joe! Add one ounce of Sea Foam per quart of oil in the crankcase. That adds up to 5 ounces of Sea Foam in the oil crankcase of your Mazda 6.

We recommend adding it 100-300 miles before your next oil change. That gives the Sea Foam enough time to circulate and clean. It also lets you drain away all the reliquefied crud (oil residues and deposits) when you change your oil.