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god awful fuel economy grand prix gxp

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Old 06-23-2009, 01:09 PM
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Originally Posted by shogun95
Since putting in the throttle spacer I am getting about 1-2 MPG better and have been averaging over the last 4 tanks about 24 MPG. I drive about 60% highway to work. If I run much more than 75 the MPG starts to drop quickly.
Which spacer did you get?
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Old 06-23-2009, 01:40 PM
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after i did my TBS and a smooth silicon tube to replace the accordian style tube that connects to the TB and MAF i saw about 2 to 3 MPG increase.
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Old 06-23-2009, 02:30 PM
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That smooth elbow really helps. My gas milage went up too. Well worth the 20 bucks.

-Mike
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Old 06-23-2009, 03:08 PM
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Originally Posted by Mgpeagle
That smooth elbow really helps. My gas milage went up too. Well worth the 20 bucks.

-Mike
Where did you get the elbow?
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Old 06-23-2009, 03:59 PM
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Any reports on mileage with the K&N intake?
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Old 06-24-2009, 09:42 AM
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Originally Posted by Mgpeagle
That smooth elbow really helps. My gas milage went up too. Well worth the 20 bucks.

-Mike
Is that in conjunction with the K&N intake or stock set-up with N&N drop-in filter? Or something different?
Originally Posted by LS1 Racing
Where did you get the elbow?
I'd also like to know. Link please!
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Old 06-24-2009, 11:47 AM
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Originally Posted by RickAKATed10
Is that in conjunction with the K&N intake or stock set-up with N&N drop-in filter? Or something different?

I'd also like to know. Link please!
i know with MPGEagle his is on intense's fenderwell intake. mine is on CAI intake. mine came from CAI but was around $50 shipped. I think the one Mike got is $20 shipped.

3rd post down has the link for them.

https://ls1tech.com/forums/ls4-front...ng-me-off.html
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Old 06-24-2009, 12:25 PM
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Blue one..

http://www.siliconeintakes.com/produ...6ac7e7b80113af

Black one...

http://www.siliconeintakes.com/produ...6ac7e7b80113af

-Mike
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Old 06-24-2009, 02:13 PM
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Thanks!
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Old 06-24-2009, 02:27 PM
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Originally Posted by LS1 Racing
Thanks!
A lot!
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Old 06-24-2009, 02:49 PM
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Your welcome, Guys.

-Mike
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Old 06-24-2009, 04:06 PM
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damn Mike you come in....throw in 2 links and you get all the gratitude...must be nice haha jk
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Old 06-24-2009, 04:15 PM
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Ha, ha... Sorry Dude....

-Mike
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Old 07-07-2009, 09:21 AM
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i drive 30 miles to work on a hilly 55 zone and have been averaging about 20 no matter how i drove. after playing around day to day to see what works better, i would agree that the faster acceleration to cruising speed does pick up mileage. the other thing that has been working for me is running my car in 3rd gear the whole way at 60mph. running about 2250rpm in 3rd which keeps the car from lugging along and having to try harder up the hills. seems to work well and my average picked up to about 24.
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Old 07-07-2009, 11:44 AM
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I get 11.2 with the hills in Pgh but over 25 on the highway.
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Old 05-05-2010, 08:58 AM
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my GP GXP gets 16.3 around town and 26 on the highway.
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Old 05-05-2010, 09:16 AM
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Originally Posted by 06blkgxplover
my GP GXP gets 16.3 around town and 26 on the highway.
sounds about right, i dont even look at my MPG, if i did i would have bought a smart car
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Old 05-05-2010, 10:31 AM
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Originally Posted by 94ss06gxp
sounds about right, i dont even look at my MPG, if i did i would have bought a smart car
Haha, agreed !!
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Old 05-05-2010, 12:23 PM
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Originally Posted by 94ss06gxp
sounds about right, i dont even look at my MPG, if i did i would have bought a smart car
amen to that
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Old 01-17-2011, 09:42 PM
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About 20 overall.

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