Finally decided to seafoam my 8, with 104,500 miles on the engine. I've only put about 1,500 on it since owning the car, but I'm pretty sure this had never been done to the engine. I disconnected the crankshaft sensor and the MAF sensor, and used the vacuum ports on the passenger side of the engine to draw the seafoam in using 1/4" tubing. The smoke show speaks for itself, it really worked! Cleared up some rough idle and improved low-end torque.

 

I need to do this soon to mine.

 

I bet it smells lovely, too. Lucky nobody called the fire department!

 

Mom doesn't look pleased....

 

It would never pass smog...lol