Florida GM Club

07LSC

I wasn't exactly sure where this would fit and this was I guess the closest related thing to it. This thread is dedicated to those who feel that air filter types don't effect gas mileage.

My cobalt gets crazy good gas mileage... partly because that's what it was made for and partly because I drive like a grandma in order to ensure great gas mileage. When I first got the car, it would average between 33 and 34 mpg only a regular basis. I was thrilled because it's one of the main reasons I got it. Then a few months later I bought a GMPP intake. When I got the intake I was excited for a lil bottom end (I don't even want to say grunt bc the car is so slow, but you get the point), and for a few points higher gas mileage. I was a little disappointed when I saw the filter that came with the intake. I was expecting a conical (spelling?) k&n style filter but instead I recieved a conical paper filter. But I though, oh well, shouldnt make that big of a difference anyway. I was wrong...

The first week or so the car drove a little different (to be expected, the car's computer is adjusting to the different intake), but once that little period was over, I was getting 30-32mpg. I was a little dissappointed but though maybe I was harder on it than usual so I did it a few more times, this time knowingly driving ridiculously gas efficeint. So one day when I worked at the shop I saw how much I could get a K&n filter for and it was like $20 for the size I needed so I said hell yeah.

The filter came the next day and again for the first week or so the car felt a lil different because the computer was adjusting (made a weird hummin noise too). But once that went away I was back to my mpg tests and I couldn't have been happier. It now gets the most consistent 35.6mpg. So I've always been a fan of the whole k&n filter bit but now I am even moreso and if any of you guys are pissed about the gas ad don't have one... get one. That's all, just thought I'd share.

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-Corey
'07 Cobalt LS I4 M5: "stock spoiler", tinted tails, black headlights, de/rebadged, 12" MTX woofer, progress springs, gmpp intake, TWM short shifter

'99 Camaro V6 M5: Too many mods to list. (sold)
"The Cammed Beast"

JonintheRedZ28

When my z was stockish (It had a Flowmaster muffler welded to the stock exhaust and tip that I didn't know I had until I pulled it off the car) and a K&N drop-in filter, I could average about 27 mpg. That's why I love LS1s. As it is, with a fairly large cam, long tubes, exhaust, a lid, and the same K&N filter, I'm getting about 12 mpg city, running rich and burning the crap out of the ethanol they've started putting in premium. I was averaging about 21 mpg before filling up with the gas with ethanol in it. I mean, it's not great, but it's decent for the size cam that it has. And the torque makes it all worth it.

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|Jon - JonintheRedZ28|1998 Chevy Camaro 5.7l LS1|FLGM Moderator|

fluffy

thats cool and great gas mileage! when i first got my car i was averaging 30-32 mpg but it was all highway, now i average 25 but its city and my foot is fat... what style k&n is it? is it the oe filter replacement or the cone style?

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Viper33884

I have the Injen CAI and switched to the AEM DryFlow and ran pretty good, seemed to flow a little better but for the 2 weeks I had it on I went through 2 MAF's, this thing sucks water like crazy, and I've had my Injen filter on for almost 2 years and no problems at all, I just have to clean the MAF every oil change due to a little filter oil build up but that's not big deal. They are sweet filters but with a CAI set-up like mine, no.

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