From: ecomodder

Here’s just one of their hard-core and one of their just plain-practical tips:

84) Avoid heater use until the engine has reached operating temperature

Engines runs rich until a minimum temperature threshold is reached. Running the heater blower before that has happened will slightly increase warm-up time and increase fuel consumption.

85) Avoid ‘warm up’ idling

Don’t idle your engine to warm it on a cold day. An idling engine gets zero miles per gallon.

Start to drive – under light loads – as soon as the engine is running smoothly (usually immediately). It’s a more efficient way to warm the engine and entire drivetrain, including tires.

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