All very good thoughts through experience, I would only like to add that in the summers I would recommend to keep the tire pressure a couple of PSI down than recommended specially if you have a long drive planned as in the summers the tires tend to add a 2-3 PSI while long hot drive.
Just my 0.02 cents.
Ofcourse flush chemicaical CLEANS well
The queation was condensor flushing where amount and pressure of this bottle is not enough.
Same freon leaves no choice of contamination inside and have enough pressure which can knock every thing out . and a cylinder has enough freon .
This is what we do in industry how ever every one is free for their choices.
Tyre pressures are usually on a sticker inside the door or inside the fuel flap. As said, it's probably better just to follow what the manufacturer recommends. Although if you're running, aftermarket wheels or a different size of tyres from standard, the manufacturer standards don't apply.
If you put a couple of extra psi in from standard, it can help to increase fuel mileage but at the expense of grip. Conversely, if you let the pressure down a bit, you will have better grip but less mileage.
Putting more air in the tyres makes it easier to do huge burnouts too 😊
Flushing with gas is a waste of time. You never get everything out, especially if you're cleaning through the valves. The only real way to do it is to take everything apart and clean all the parts individually using a solvent cleaner like the one below and dry air. Ordinary compressor air is no good as it contains water, however air from a paint booth which is fitted with an air dryer would be fine. It's important to clean the system after changing a compressor. You wouldn't believe how many particles are introduced into the system from a dying compressor until you run solvent through and see the colour of it when it comes out again. Cleaning only one part such as the condenser is also a waste of time because as soon as you recharge the system and operate it, all the crap from the rest of the system will contaminate it again.