Michael Rigby-Jones wrote:

> Cold air is denser, so more fuel gets injected (assuming injected engined rather than carbs), hence more power in cold weather!  However, it shouldn't make it use more fuel unless you take advantage of the extra power...

Cold air is denser than warm air getting more oxygen into the engine. the control system will add more fuel to get efficient burning and a bigger bang. Manifold pressure is effectively higher getting more torque and horsepower for a given engine speed.

w..

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