parehas tayo bosing, in the morning, i let my engine warm up first. i wait for the temp to reach half of the guage then start to drive, after which i switch on the fan of my A/C, then the thermostat switch.
before i reach my destination or park, i switch off the thermostat of the a/c first, then when I'm properly parked i switch of the radio first then the fan of the a/c then the engine.
i don't rev the engine anymore since efi naman sya.