What are your tricks?

[Reddog99]

Originally Posted by BailOut

Using the heater does affect mileage, by the way, although much less so than using a/c. It steals heat from the coolant and this causes the ECU to run a richer fuel map in an effort to produce more waste heat to reheat it.

Let's see, by this twisted logic, losing heat from the radiator also increases fuel usage because it causes "the ECU to run a richer fuel map in an effort to produce more waste heat to reheat it." NOT!!!

Turning on the heater only causes the thermostat to close a little to compensate for the temperature loss that would otherwise occur through the radiator. Any modern (or old) engine produces so much waste heat that there is absolutely no need to make an effort to create more.