Bought 2 cans.
1 full can went in to an almost empty tank and then filled to full with 93.
Half can went into IM via vacuum line, other half went into crankcase with a fresh fill of Amsoil Synthetic 5W-30 (5qts).
I usually change my oil every 6k, but will run this oil for 3k with the Sea Foam and then replace. If you pour it into your crankcase with old oil, then it’s not recommended to drive more than 100 miles before changing.