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05-22-2004, 03:02 PM
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Join Date: Dec 2003
Location: Southport, Indiana
Posts: 70
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All these intake, exhaust systems and other performance parts say they improve gas mileage. Have any of you experienced an increase?
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05-22-2004, 03:02 PM
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Join Date: Dec 2003
Location: Southport, Indiana
Posts: 70
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All these intake, exhaust systems and other performance parts say they improve gas mileage. Have any of you experienced an increase?
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05-22-2004, 03:02 PM
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Join Date: Dec 2003
Location: Southport, Indiana
Posts: 70
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All these intake, exhaust systems and other performance parts say they improve gas mileage. Have any of you experienced an increase?
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05-22-2004, 04:03 PM
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Hummer Authority
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Join Date: May 2004
Location: The Carolina's
Posts: 1,198
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On my Tundra I installed a K&N FIPK intake system and an off road free flow muffler. I think the loud noise "tricked" me into thinking that it had more power than reality. Where it made a difference was hauling heavy items up hill. As for the MPG, I got an average of 15 before the "upgrades and got 15 after. I will admit that I gunned the accelerator often because I liked the sound. Also, my driving habits may have chnged for the worse to evoke the loud rumble as well. Nonetheless, I do plan on getting a cat back system for the H2 but i won't mess with the intake. Too loud!
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2006 Fusion Orange Limited Edition H2
2008 Greystone Metallic / Sedona H2 (Sold)
2004 Sage Green H2 LUX w/ Nav (Sold)
2006 Black H3 LUX + Off Road (Sold)
2003 Yellow H2 LUX (Sold)
2003 Pewter H2 Adventure (Sold)
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05-22-2004, 10:13 PM
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Hummer Professional
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Join Date: Mar 2004
Location: Arizona
Posts: 324
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Spend $10,000 for a supper charger and get 17 mph. It might work out at $2 a gal of gas. Or only pick the roads that are going down hill. Sorry I'm bored. With the supper charger you can have fun driving around with 550 HP while your getting your money back with expensive gas.
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05-23-2004, 07:04 AM
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Hummer Veteran
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Join Date: Dec 2003
Location: Newnan, GA (transplanted Texan)
Posts: 82
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Yellow 03 Adventure w/black Grill, UM8 Touch Screen Navigation Radio, U2K XM Digital Radio, Remote 6-CD Changer, JBA Titanium Headers, Corsa Off-Road Sport, Airaid Filter & MIT, Nology Wires & Plugs, S&P Pro-Flash, Warn 9.5ti w/X-Line, Toyo Open Country M/T 37x13.5.
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05-23-2004, 01:55 PM
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Hummer Veteran
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Join Date: Feb 2003
Location: Sioux City, IA, USA
Posts: 70
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With a little luck, you will see a one mile per gallon increase with the free flow air filter and Corsa type exhaust replacement. Probably will pay for itself in 50,000 miles at $2 gas. Having monitored several vehicles, I have also documented a small increase in fuel economy by switching to Mobil 1/synthetic oil. Same payback, as the increase will essentially pay for the cost of the oil change at 5,000 mile intervals. Obviously driving conditions have the greatest effect. My '04 H2 with the Corsa, Airaid, and Mobil 1 will dependably maintain 15 mpg on flat interstate in a no wind condition with cruise set at 69 mph (65mph speed limit-no traffic stops at 4 over). But, after leaving the freeway and entering into urban stops and starts, hills, and stop light idling, it is nearly impossible to stay above 13mpg for the tank.
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05-23-2004, 03:12 PM
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Join Date: Dec 2003
Location: Southport, Indiana
Posts: 70
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I did the K&N filter thing and didn't see a difference. I was just curious if any of these accessories work or if they are just a marketing hype
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06-15-2004, 06:02 AM
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Hummer Veteran
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Join Date: Apr 2004
Location: HB SoCal
Posts: 39
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I replaced the air filter with the AIRAID and didn't see much in fuel economy improvement. Added Basanni Cat-back system, which showed slight improvement for fuel economy (1MPG). Added Basanni full headers (Cal legal) and I've added another 1 to 2 MPG on average. I typically drive 80% on the higway at 70MPH and rest is city stop and go.
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04 H2 Black LUX, Air suspension, NAV, Basanni Cat-back exhaust & full ceramic headers, Airaid Intake, Audiovox headrest DVD system
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06-15-2004, 11:08 AM
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Hummer Veteran
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Join Date: May 2004
Location: Lighthouse Point Florida
Posts: 175
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I did the exhaust and intake. Maybe one mpg improvement. As with most I think your habits change when you hear that V8 rumble.
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2004 Lux with 6 inch Fabtech with tie rods, 38 inch MT's, 4:88 gears, and some minor engine tweaks.
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07-20-2004, 01:30 PM
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Hummer Veteran
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Join Date: Jul 2004
Posts: 112
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I was getting around 9.5mpg when I first got my 03' Pewter H2. I installed a K&N FIPK and a tornado and now I get 11.5mpg.
I don't think the FIPK seals up tight so if anyone has any tricks that may help, I would be interested.
Thanks,
David
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03\' Pewter Adventure SUV (sold)
05\' Pewter Lux SUV
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07-21-2004, 09:06 PM
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Hummer Expert
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Join Date: Jan 2004
Location: Runnin with NASCAR, sometimes Central NJ
Posts: 932
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Despite what they claim, air filters and exhausts do not increase mileage much--they are to let the engine breath and expel exhaust better for improved performance. Mileage is secondary---they just want to sell the stuff so they put that in their ad---it is true but almost unmeasurable.
Headers do improve mileage a bit and are worth it for improved performance--you will never pay them off in gas savings though.
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