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Cadillac Escalade, EXT and ESV Forum - 1999 - 2006 Discussion, Best CAI for MPG Increase? in Cadillac Escalade Forums; Originally Posted by Pitbull14218 It should increase mpg if you drive it right, think about it, the piston is able ...
  1. #16
    the cadillac man's Avatar
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    Quote Originally Posted by Pitbull14218
    It should increase mpg if you drive it right, think about it, the piston is able to travel downwards with less effort, same thing with exhaust. If you make it easier for the pistons to travel it will make the engine run easier decreasing the load on the engine. It will need less power to turn the crank. Sure it will need to correct the air fuel ratio but either way the engine becomes more efficient, maybe now applying the gas during normal driving takes less time to get up to and maintain speed. Making it easier to maintain speed should increase mpg.
    True but these are heavy trucks

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    hcubed is offline Cadillac Owners Member
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    Re: Best CAI for MPG Increase?

    Airing up the tires?
    How about checking and inflating the tires to the correct inflation pressure instead?

  3. #18
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    Quote Originally Posted by hcubed
    Airing up the tires? How about checking and inflating the tires to the correct inflation pressure instead?
    sounds safer to me

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    Re: Best CAI for MPG Increase?

    Quote Originally Posted by hcubed View Post
    Airing up the tires?
    How about checking and inflating the tires to the correct inflation pressure instead?
    Or a little more. 30 PSI that's recommended is more for ride comfort. I usually run at least 35.

  5. #20
    the cadillac man's Avatar
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    Quote Originally Posted by caddydaddy
    Or a little more. 30 PSI that's recommended is more for ride comfort. I usually run at least 35.
    I run about 36psi front and rear

    Gm specs list 32psi

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    Re: Best CAI for MPG Increase?

    She could try smaller wheels! I know when I went from my stock 17's to my 22's my mileage dropped from 13.1 to 11.9...

  7. #22
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    Re: Best CAI for MPG Increase?

    Quote Originally Posted by Silver04 View Post
    How does she drive? Is she smooth in the use of throttle and brake? That alone can make a big difference (relatively speaking) in mileage. I'm assuming all other maintenance items are good.
    Yup, my ex-gf used to drive my Trailblazer. I would get about 16-17mpg driving it locally, she averaged about 12 and complained about the fuel economy. One day I went with her on an errand and let her drive. I noticed right off the bat that she was one of those on the gas or on the brake drivers, no in-between. She would accelerate right up to the stoplight only taking her foot off the gas to put it on the brake pedal.

    I bought her a 99 Chrysler Cirrus with the 2.5L V6 in it, she only averages about 17-22 mpg in it because of her driving habits.

    ----------

    Quote Originally Posted by Rolex View Post



    From my experience with the past 4 vehicles I've owned, they make your intake louder, give you a negligible gain in hp and/or performance, and don't do a darn thing to improve mpg. I believe the power of suggestion is at work on people after they install these CAIs. People seem to be able to "feel" a difference in acceleration and notice "better" mpg. I think it's all creative marketing and hogwash. If your mpg improves it's a result of changing your driving habits, and not the CAI.

    They are on of the most popular add ons to late model vehicles, but don't expect the CAI to pay for itself by improving mpg. I'm just saying.
    My experience as well. I have an open airbox and K&N on my Corvette and it did seem to help at the track but not on the street. After all, you engine breathes pretty well from the factory in normal cruising, at the track though where you're running high RPM then the CAI kits seem to show you something for your money.

    I'm also not a fan of CAI kits on normal street cars that see bad weather. Had a friend hydro-lock his C5 Corvette after adding a CAI kit. It was a good kit as it drew air from in front of the radiator but it also provided a straight shot to the intake for the water. He hit a deep puddle in an intersection and that was all she wrote, new engine $7K later. The stock intakes have water traps built in to prevent this from happening.

    Replacing the exhaust a lot of time helps, but it depends on how restrictive your factory setup is. On my STS-V, I'm getting about 2mpg better using my daily commute route/conditions as a baseline. I also replaced the factory system on my Escalade with a Magnaflow setup, sound is nice but it didn't do a thing for my fuel economy. Surprisingly the factory exhaust on the Escalade seems to be pretty well designed. On the Caddy though, I'm guessing the need for quiet outweighed the extra performance.

  8. #23
    caddydaddy's Avatar
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    Re: Best CAI for MPG Increase?

    I have an Airaid intake, but the biggest improvement in MPGs was after I used this: http://www.hypertech-inc.com/products-max-energy.aspx Definitely noticed a nearly 2 MPG increase on the highway and it runs great on 87 octane gas now!

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