increasing the fan speed eats up more current not gas.
increasing the thermostat level would surely increase gas consumption
because of the extra load by the engine driving the compressor.
more current flowing through the stator coil of the alternator will create more back EMF on the rotor coil... So, more load on the alternator rotor = more gas consumption.... but may not be so noticable.
Sensing a hint of weakening on our 6yr old Thai Pana DIN74, went to the distributor to have it...
Which is better? Amaron or Panasonic Battery?