I have used seafoam to clean the injectors and top end on my wife's car. A 2000 Malibu 3100 V6. I want to use it in the crankcase also. The directions on the can tell how much to put in but they do not say for how long. Do you run this stuff for a while or for 5 minutes like gunk and others and then drain the oil or what? The car is due an oil change in about 1000 miles. Should I put it in and just drive it till oil change time or what? Thanks...

 

Just mix in oil and drive away. Flush with future oil changes. I have used it in evertyhing.