Colder air is denser and therefore has a slightly higer oxygen content. It is usually also less humid as well, again dry air tends to be slightly higher in oxygen content.
Additionally the colder air temps also keep the air intake path a bit cooler, for better overall performance.
What you are experiening is fairly typical as air temps drop close to freezing.
Additionally the colder air temps also keep the air intake path a bit cooler, for better overall performance.
What you are experiening is fairly typical as air temps drop close to freezing.