• What kind of oil should I use for retrofitting?
• If I put in refrigerant (top off), do I need to add oil too? If so, what type and how much?
• Why are there different types and viscosities of oil, and which should I use?
• What if I use a leak sealer and recharge my system, but it's still not blowing cold?
• How do I know if the leak sealer is working?
• Are leak sealers safe for my A/C system? What does "System Safe" leak sealer mean?
• Will leak sealers seal ANY leak? What size hole will they seal?
• How do I locate my low pressure port?