Join Date: Jan 2005
Location: Long Island, NY, USA
SeaFoam SeaFoam Motor Treatment
The day before I an going to change the oil I dump about 2/3 of the can in the block with the oil and the last 1/3 I suck into the engine via any vaccuum line I can find, pulling until the engine starts to stall. Turn the engine off and leave it anywhere from about 20 minutes as the instructions say to overnight, which I did this time.
Turn the engine on and enjoy the show. Smoke and crud will fly with abandon from the tail pipe, leaving a nice black mark on the ground. About 10 minutes later it settles down and I change the oil. I have noticed that my truck runs a lot better after my semi-anual treatments, one time before the winter, and one time before the summer.