Refrigerant Capacity & General AC Discussion...
I just got through servicing my truck's A/C, then my Lexus A/C, and happen to look at the sticker under the hood regarding the Mirage A/C capacity.
Background - When I was working for Hyundai-Kia, a couple of years of that was spent doing A/C audits. A person learns a lot about such systems doing work like that. One of the first things I learned was that the A/C system is not very complex. But you don't know what you don't know. Based on that experience, I learned that the only good way to service the A/C system is to evacuate it and then add the correct amount of refrigerant. Just adding refrigerant is like throwing a dart at a dart board in a room with no light at midnight. Those gauges that come on some refrigerant bottles is still a shot in the dark.
Fast forward ~10 years (time flies) from doing those audits, I've been lazy and not taking care of my vehicles A/C systems. My truck's A/C hasn't worked effectively for YEARS. I recently went to service it and and remembered I let someone borrow my vacuum pump. I don't remember who it was, but I do remember as it was driving away I said to myself, "I wonder if I'll ever see it again." I never did. And I cannot remember who that was. So I had to go buy another one (~$80).
I just serviced (empty, vacuum, hold vacuum, refill using a weight scale) my truck's A/C, now it snows inside. It is wonderful.
I also serviced my Lexus LS 460L's system, just because it was cycling at idle. It is now Antarctica inside. But it wasn't bad before, just cycling.
While doing the Lexus, I popped the hood on the Mirage and found the sticker regarding the A/C system refrigerant and laughed out loud!
My truck's refrigerant capacity: 904 grams (and the truck's cab is smaller than the Lexus).
My Lexus's refrigerant capacity: 750 grams (650 for the standard car, 750 for the dual zone A/C).
My Mirage's refrigerant capacity: 270 grams!
Even the refrigerant capacity is cute and little! I wanted to add that yes, a small refrigerant capacity (and the associated balance of compressor, evaporator and condenser sizing) does effect cooling capability. So yes, we have less cooling capability. I will say though that with correct system refrigerant capacity is, that the system is 'adequate.' But I don't believe it will ever be Antarctica inside our vehicles.
In the end, this is NOT a complaint about our A/C system. It is just like the rest of the car. Little, small, inexpensive, and oh so very cute. 270 grams (340 gram can / 12 ounces) is less than the standard 12 ounce refrigerant cans! So it is very inexpensive to recharge this system. It sure would be nice if the system had been designed to be 12 ounces even.
View my fuel log 2020 Mirage ES 1.2 manual: 42.3 mpg (US) ... 18.0 km/L ... 5.6 L/100 km ... 50.8 mpg (Imp)