Sea Foam in oil with cylinder deactivation in a 6.2L GM [SOLVED]

Yes, Sea Foam Motor Treatment or High Mileage is safe to use in your GM 6.2L engine with cylinder activation (Active Fuel Management (AFM), as GM calls it). The active cylinders use “low tension” piston rings that have a tendency to gum-up and stick, causing oil burning. Sea Foam Motor Treatment in the oil helps to re-liquify sticky gum and varnish deposits, which get drained away when you change your oil. Sea Foam Motor Treatment and High Mileage are gentle and safe to use on all seals, O-rings and gaskets. Both are compatible with conventional, synthetic blend and full synthetic engine oils.

While Sea Foam Motor Treatment or Sea Foam High Mileage can be added at any time between oil change intervals, we recommend adding Sea Foam to an oil crankcase 100 to 300 drive miles before changing oil and filter. DO NOT exceed one treatment per oil change interval. DO NOT exceed 1 ounce of Sea Foam per quart of engine oil. After a couple “end of service” oil treatments, it is safe to add Sea Foam Motor Treatment or High Mileage at the beginning of the oil life, Just add 1 ounce of Sea Foam Motor Treatment or High Mileage per quart of engine oil when the oil is new. Sea Foam can stay in the engine oil for the entire duration of the oil change interval.