Just an FYI........there is a device called a tornado that creates a vortex in your engine from the air intake. This allows for better gas mileage because the gas/air mix is better (or so say all the manufacturers of these things). There are a bunch of different companies that make these things, the particular one I have is here: http://www.tornadoair.com/ , but I'm sure other ones work as well. It is very easy to install (I am not a car guy, but it was extremely simple for me to install it). With the amount of driving I do, it paid for itself in one year (and that is when I first bought it, with around $2.10 gas). With gas only going to get more expensive, these are definitely a relatively cheap way to become more fuel efficient. The only thing you have to watch out for is getting the right size for your particular make/model/year.