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how does letting it warm up at idle kill the mileage? when its cold out i useualy start it up and warm it up for like 5 min
If the motor is running (using gas) and the truck isn't moving (no miles being accumulated) then gas milage will decrease.
Not to mention a cold engine needs more fuel to keep running (carb or FI) so if your only doing short trips and never warming up your always burning more gas than if the truck was warmed up. Which goes back to using gas while idleing to warm up. You can't win
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