How much will the MPG go up on my 2000 Nissan Maxima if I add a cold air intake?
None. None that you will notice, anyway. Plus, keep this in mind. Let's say you save $1 every 100 miles or so. (highly optimistic) And your intake costs about $100. Which means, you need to go 10,000 miles, before you've even paid off the intake. So, a year from now, you'll actually save money. Plus, people have this great habit, that when they get an intake, that they drive harder. To experience the extra power it supposedly gave them. This decreases fuel economy. Thus, it's a complete wash.
None. Contrary to popular belief, a metal pipe attached to your MAF/MAP sensor with a cone-shaped filter will not increase your horsepower by 20 nor will it give you better miles per gallon. It will be as if you did nothing to your intake piping and kept it stock, and just made it look shiny. Just think about it how a car works, and how your MAF works. I don't know who made these absurd claims, but unless there is restricted air in the first place - it won't do anything.
I easily have an 06 Altima 3.5, it is close to in fact a similar motor vehicle engine sensible. as quickly as I threw on an intake it definately made it a lot louder from 4k RPM to redline. the different autos i've got had and threw an intake on did no longer somewhat impact the sound that a lot, yet for the VQ motor it definately wakes up the noise up extreme. As for overall performance, you're realistically finding at next to none.
