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1, yes you are increasing heat load.
2, depends on how over computerized everything is. Likely its just the cold coils of aluminum and the water that makes up the mass of the evap coil and ducting that blow cool air for a short time after the A/C is switched off.
3, the tests I remember reading about said that A/C decreases fuel mileage by around 10%.
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1984 chevy suburban, custom made 6.5L diesel turbocharged with a Garrett T76 and Holset HE351VE, 22:1 compression 13psi of intercooled boost.
1989 firebird mostly stock. Aside from the 6-speed manual trans, corvette gen 5 front brakes, 1LE drive shaft, 4th Gen disc brake fbody rear end.
2011 leaf SL, white, portable 240v CHAdeMO, trailer hitch, new batt as of 2014.
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