Does anybody notice if they get better mileage when it is warmer or colder out? This guy was tellin me everyone gets better mileage in the summer because the air is warmer and less dense, meaning you would use less fuel. Colder air is more dense so you use more fuel. It kinda sounds right to me, but I think that you would be losing performance when it is hot out due to less matter in the cylinder. What do you guys think about this? Colder temps=less mileage

 

i get 126.5 miles to the tank if its above 72.6 degrees, if its above 84 i get 200 miles to a tank and if its below 26 i get 500 miles to a tank, and if its between 27 and 71 i only get 3 mpg

 

well....if you pump your car/bike when it's cold outside, you get more gas. The reason is because of what you said...it's more dense. I doubt it'll make a HUGE difference though.

 

Cold air intakes and such should add power/economy, assuming your motor isn't in an extreemly lean situation and the stoichiometry is still close to ideal (air/fuel ratio of 14.7???).

The flip side is VERY cold air has to be heated before it is used in combustion. The need to heat the air will use energy, thusly and therefore, hurting efficiency.

So the answer is is....probably a little more power is made when it is cool than whenit is hot.