i bought mine at Advance Auto.. they should have it in Autozone...

step 2 shows where to put it in the intake.. just leave the car running w/ engine warm... slowly pour in 1/3 bottle, don't let the car stall... turn off car for 15 min.. crank car.. go for "spirited" drive to blow out all the sludge you just dissolved.. **Caution.. may cause lots of smoke...