Does it really help your gas mileage if you change your air filter frequently or is it a marketing scam?

CLEAN AIR FILTERS ALLOW AN ENGINE TO BREATHE PROPERLY...WHEN THEY DO THEY BURN GAS MORE EFFICENTLY
Does it really help your gas mileage if you change your air filter frequently or is it a marketing scam?
Yes it will help your gas mileage if you have a new air filter every 12,000 miles.
Does it really help your gas mileage if you change your air filter frequently or is it a marketing scam?
A dirty air filter will definately hurt your gas mileage. It will also hurt performance and could cause your car to fail an emmissions test.

However, unless your always driving in a cloud of dust, a new air filter should last at least a year.
Yes it helps. your engine can't work as efficiently if it don't get enough air to mix with the fuel!
a dirty air filter can act as a choke, causing more fuel to enter and les air. this will decrease the power output of the engine and drop fuel economy.
If you drive with a dirty filter, it will use more fuel. Frequency of necessary changes depends on the conditions you drive in. If it is a dusty dirty area it will need to be changed more frequently. It isn't that expensive or difficult and is cheap insurance to make your car run more efficiently. ADDED---Your car is still under warranty, so I would not suggest installing a K%26amp;N filter. They are known to void the factory warranty and I don't think you want to risk it for a minimal improvement at best.
You defiantly need to have a clean filter in your car. If you want the most mileage purchase a K%26amp;N filter. They are expensive but they are cleanable and will be the last filter that you ever buy for your car. They do increase fuel mileage as well.
it depends, for certain cars yes it will make a difference, but im not sure how significant it is, but i suppose every little bit helps.

just like putting more air in your tires, that save gas because the car doesn't have to use as much energy that way.

hope i helped:)
Yes, they should last about a year/12,000 miles...avoid Fram (terrible quality) K %26amp; N has a great marketing department (really expensive, and do you really want to wash it using their %26quot;special%26quot; cleaner) trust me, just get a good quality Wix air filter, throw it away / put in a new one once a year you'll be all set.
no it really does help one to change it but you don't have to change it as often unless you live in a real dusty place where its constantly getting dusty and dirty,it is important though to change it when needed,a good way to tell when it needs changed is remove it and hold it up to a light and if you can still see though it then its still good,when it gets dirty enough that you can see the dirt or you cant no longer see light though it replace it,good luck.
It definitely does!
It depends what brand flux capacitor you have installed in your car...