Figuring out how much oil to put in air conditioning compressor
Knowing exactly how much oil to put in air conditioning compressor units is basically the difference between a car that blows ice-cold air and one that leaves you sweating on a highway shoulder with a seized engine. It's one of those things that seems simple on paper—just pour some oil in, right?—but in reality, it's a bit of a balancing act. If you put in too little, the internal parts of the compressor will grind themselves into a metallic pulp. If you put in too much, the oil will take up space meant for the refrigerant, and your AC will barely cool at all. ...