THE EASIEST AND MOST EFFICIENT WAY TO APPLY SEA FOAM IS THROUGH THE POWER BRAKE BOOSTER VACUUM. THE BIG LINE WITH THE VALVE ON IT. PULL IT OUT WITH THE VEHICLE RUNNING, POUR THE SEA FOAM INTO THE LINE, IT WILL SUCK IT DOWN FROM SUCTION, POUR SLOWLY, ALMOST UNTIL THE VEHICLE STALLS BUT NOT THAT MUCH JUST UNTIL THE IDLE STARTS GETTING ROUGH. USE A WHOLE CAN, YES THE ENTIRE CAN BECAUSE ITS A V-6. AFTER THE ENTIRE CAN IS IN SHUT OFF THE MOTOR. WAIT ABOUT 30MIN. START, IT WILL HARD START AND WILL SMOKE ALOT, LIKE A HEADGASKET JUST BLEW, DONT WORRY, YOUR FINE. NOW TAKE IT FOR A BRISK RIDE TO BURN IT ALL OFF. YOUR DONE. WHEN YOU GET HOME DROP ANOTHER HALF CAN INTO GAS TANK, THE REMAINDER HALF INTO OIL THROUGH FILL HOLE. RUN NORMAL. THIS WONT BREAK YOUR OIL DOWN, IT ONLY INCREASES DETERGENTS TO CLEAN ENGINE. CHANGE AS REQUIRED WHEN YOUR DUE. 3000 MILES OR WHATEVER YOUR SCHEDULE IS. IF YOUR ENGINE IS REAL BAD, NEGLECTED, DONT ADD ANY MORE TO VACUUM LINE, BUT FEEL FREE TO ADD CAN TO GAS EVERY WEEK FOR A MONTH. IT WILL CLEAN THE ENGINE OVER THAT PERIOD OF TIME JUST FINE. I USE TO RUN MY OWN SHOP, I HAD MY MECHANIC AND SERVICE MANAGER BOTH ADVISE ME OF THIS PROCEDURE, 100% SAFE, JUST REMEMBER NOT TO ADD SEA FOAM SO QUICKLY IT STALLS THE ENGINE OUT! GOOD LUCK, IM SURE YOUR 3.3L WILL LOVE IT. IVE PERSONALLY USE IT ON MY 3.5L AND IT IS GREAT.