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hot air from vents into intake?
I don't know how many people have covered this idea:
My assumption is that in the cold winter months ( it being -10 degrees F outside) that you could route the hot air from your cars climate control/air vents into the vehicles intake to get better fuel efficiency in winter?
Maybe you could use the hot air from the vents close to the pedals.
My average in summer when its warm is around 35 mpg, but in winter it drops to around 22 with the cold climate on the highway.
Maybe to run a small hose through the firewall and into the engine compartment?
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