Those are seriously the smallest tires I've ever heard of on a Cobalt I've got 225/45-17 and they are only slightly larger than stock by 3/4" yours are smaller than stock by 3/4" Your DIC will tell you that you're getting better gas mileage than you really. Be sure to keep than in mind. Your tires are revving 27 more times per mile than stock height tires.

 

do messing with my impala rental i found its DIC has an instant fuel economy along with the regular fuel economy (forgot what its called) going down hill shows 99mpg in drive and from 99 to 91-95 in neutral

 

 

Best thing for fuel economy is a low pressure turbo and proper tuning..

 

not a mod rather maintenance

clean that MAF every 10,000 ish...can improve MPG 1 or 2 depending on how dirty it gets it can be more

 

The mass air flow sensor is located in the intake correct? how do you go about cleaning it? I've never had it out, is it metal, glass, or screened like a PCV? Sorry for the unenlightened post Honest question though.

 

when i dropped my subs in I lost 8 mpg

120 lbs not including amps.

=[

 

no way... ive added way more weight then that and i dont think its been that much of a loss

 

So, who are you people? Are you driving Chevy Cobalts? I have an '07 SS Sedan (2.4l unboosted) and I get 24MPG average on a good day. This is 45mph on sideroads and being very gentle, including a 2 mile stretch I coast in neutral the entire way. Highway only, with no traffic is 24.5MPG, best case. Driving city 25mph average, with a lot of stop-and-go, I'll see about 23.5MPG.

So, where do I buy one of the cars you guys are driving, or do you all just add 20MPG to your numbers like civic drivers add 2' wings to their trunks to make them go faster?

 

How many miles have you put on your car. You should be getting high 20s and low 30s average. in a 2.4

Try cleaning your MAF and TB. Do a tune up and stuff.

 

ya seriously i have a g5 gt w/ the 2.4 and it's a 2008 w/ 11k miles on it. i have the K&N typhoon intake and my tires are inflated right. if i drive 65 on the highway i'll get MAYBE 31 but usually 29 or 30 MPG. in the city it's a lot of stop and go and when i do take it easy i'll get like 22-24 mpg at best. how are some of yall getting 40+ thats insane i want a super MPG car like that. o an di run premium grade gas in my car.

 

40K miles. Have a fresh, clean air filter, otherwise no mods. I'll clean the MAF and TB, that is always a good idea, but the mileage has been the same for 38K of the 40K (it sucked the first couple thousand as the engine was still tight). I got 19MPG on my first tank...

 

Check your right shoe...someone musta filled it with lead

Serious, I average 32-33 with my 2.4 5 speed (15% city 85% highway), 37-38 on long highway runs at 60 - 65 mph. 75 mph drops it to low 30's.

 

i might give it really gas once or twice to pass someone like when i go back and forth from houston to austin. my last trip i avg'd 28.9 and i was going pretty steady 70-75 the whole time. maybe gave it gas once if at all.

 

take public transportation... i dont think anyone said that yet

 

hahaha so true

 

how does everyone get such good gas mialage lol i get like 19-21 on the freeway???? i dont stomp on it or rape it ( most the time)... i drive a redline if that makes a diffrence. i dont get it

 

What type of modifications are available? Bicycle Mod
Where can they be purchased? Walmart
Generally, how much will they cost to purchase and have installed? At the most $150
How effective are they? 100%
To what degree will they hinder performance? None, since you will increase your stamina, and the more you ride the stronger you get.

LOL sorry i had to...

 

stickers...lots and lots of stickers... u could also cut a hole in the floor and flintstone ur car ..that works too

 

lol flinstoning the car down hill ftw

 

I stripped down my whole car so there is nothing inside but the bare essentials to drive. I also went on a diet, losing about 100 pounds, dropping me to about 80 pounds. Overall I think it was worth the 3 mpg difference and I encourage others to do the same

 

lighter weight rims and tires

 

lol id probably love it too but im going to opposite direction

 

Ya for sure this is the best mod for gas mileage,I did it before I got my car brought down to me and didn even have to puill into a Gas station for a whole month!!!!

 

I drive a 06 ss/sc as of now I only have an Injen cai and I see an average of around 28 @ 70 mph (25/75 highway) with multiple 90-100 mph runs while making passes I'm a wine addict. Not sure on the accuracy of the DIC will do the math on my next tank.