I have heard that to save gasoline while using the A/C (air conditioner) use the low speed setting for the fan.
No! The energy consumption difference between running the fan on low speed and high speed is negligible and wouldn't show up in fuel consumption tests.
However, the A/C temperature setting is a critical factor in fuel
consumption since it directly correlates with how much the compressor runs. The compressor pulls up to 10 horsepower away from the motor. The best way to save fuel when using the A/C is to run the compressor as little as possible. Set the cabin temp on the warmest setting that still keeps you comfortable. Run the blower fan on its highest setting, which will maximize the convection cooling effect of the air coming out of the A/C ducts.
However, the A/C temperature setting is a critical factor in fuel
consumption since it directly correlates with how much the compressor runs. The compressor pulls up to 10 horsepower away from the motor. The best way to save fuel when using the A/C is to run the compressor as little as possible. Set the cabin temp on the warmest setting that still keeps you comfortable. Run the blower fan on its highest setting, which will maximize the convection cooling effect of the air coming out of the A/C ducts.
