Seafoam 2011 3.8 Genesis Sedan

[change741]

100,000 miles, I used the sea-foam spray. Injected it after the control module, MAF I think? Disconnected a small hose, the can of foam came with a red plastic tube. Injected about half of the 12 ounce can, had the RPMs at about 1500 to 2000 during injection. Injected, turned car off, 20 minutes later started it up. A large dense cloud, more white than black came out for at least a minute. Drove it around the block, "pedal to the metal". Exhaust cleared up. Changed the oil.
I would like to change the spark plugs next, but I am uneasy about removing the intake manifold.
see pictures

 

[princelybug]

Do you notice any difference post-Sea Foam?

 

[change741]

Not yet, only about 10 miles post foam. I was thinking MPGs might improve.