Would it be best to add Sea Foam when engine is cold or after driving it awhile to warm-up engine temperature? [SOLVED]

Thanks for the question!

For Sea Foam in the gas tank or oil crankcase, it does not matter if the engine is hot or cold. In the gas tank, Sea Foam will clean and lubricate as the treated fuel is drawn through the fuel system. In the oil crankcase, the Sea Foam will circulate and clean as the engine runs.

The best time to add Sea Foam to the gas is when you’ve got about 1/4-1/8 of a tank left. Add an entire 16 oz can, drive until it’s almost empty, and then refuel as normal. The high concentration works very well to clean.

The best time to add Sea Foam is 100-300 miles before your next oil change. That gives the Sea Foam enough time to circulate and clean, and it allows all the reliquefied oil residues to be drained away with the old oil. Add 1 ounce of Sea Foam per quart of oil.