I have always done it so that as I finish the half bottle I let it stall out. I let it sit for a little while and then start it up (will be alittle hard to start). Then take it for a nice spirited drive with the james bond smoke screen behind me! You could also buy Seafoam Deep Creep (beleive it is the same just in an aerosel can), to clean the throttle body etc. Will have to do that after it stalls out cause you cant pull off the intake hose while the car is running, and I would not spray it throgh the MAF sensor. Also I usually drive it around for a couple of days then change the plugs, oil etc.