I know in older cars, if you had the A/C on cold, but not at the coldest, it would bring in warm air from the engine to warm the air a bit.

Do the new accords with climate control do the same thing? Or, does it cycle the compressor less as to save energy. If it does, I would rather run the A/C at 70 degrees and save a bit of gas, but if it just mixes hot air, I would rather run it at Lo.

I have a feeling it depends on the difference in temperature of the outside air and the temp you want. For example, if it is 90 outside, I don't think it will mix hot air if you run it at 70. But if it is 80 outside and you want 75...what does it do?