Camry 2004, about 135K miles.
Friday afternoon, temperature maybe 95+, the A/C felt like it was weakening. I was close to my Trusted Independent Mechanic, so I stopped in without consulting Car Talk.
The shop added 0.25 lb of refrigerant (one hour turn-around!), and A/C seemed OK. (Have not driven the car since late Friday afternoon. It’s now Sunday afternoon.)
Checking my records, just two years ago that shop added 0.5 lb of refrigerant. Both then and now, the work order says they added dye to the system, so I infer that they found no detectable leaks.
Question: Is that leakage – 0.25 lb in two years – reasonable for the car?
Tutorial question: I have vague recollection that the A/C works pretty OK as it loses a little refrigerant, but then goes “off a cliff”. Is that right?