>3 lbs will max it following evacuation. They MUST evacuate the system or >problems >might develop (e.g., moisture in the system could ruin seals, etc.). I just checked the A/C Charge info on my car and it takes 1100 grams (2.42 lbs) of R-12 MAX. Later! Eric Fletcher '87 5KCSTQIA2RSR2B St. Louis, MO STEADIRIC@aol.com