If my vehicle calls for 4.5 quarts of engine oil how much Sea Foam could I use in the oil? [SOLVED]

Hi Terence,

Thanks for the question! For a 4.5 oz oil capacity, use 4 oz of Sea Foam.

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 (residues and deposits) when you change your oil.