MPG decrease?
Thread Starter
Registered User
Joined: Jul 2003
Posts: 68
MPG decrease?
I got a helix upipe sitting in my room and a stromung TBE coming soon. When i install these will my mpg decause? cuz I spend so much on gas already =(
What mods will increase or decrease mpg or will they all make it decrease?
thx.
What mods will increase or decrease mpg or will they all make it decrease?
thx.
Guest
Posts: n/a
It should actually increase your gas mileage, although it takes a supreme effort of will to see this 
. If i'm really nice to my car on a tank I get 4-5 mpg more than stock with my cobb stg 2 setup with uppipe. If anything, your gas mileage should stay the same or increase.
. If i'm really nice to my car on a tank I get 4-5 mpg more than stock with my cobb stg 2 setup with uppipe. If anything, your gas mileage should stay the same or increase.
Registered User
Joined: May 2004
Posts: 66
From: Mass
Car Info: '99 OBS
I have a cruicial uppipe, a bosal downpipe, and a magnaflow exhaust and I recored the worst gas mileage of my car ever a few days ago. 17 mpg. I've never seen such poor gas mileage from a 2.0 liter car. The highest I've ever seen from my car is just under 21 mpg. I know I usually don't drive in the most feul efficient manor but really... 17mpg? My buddy's suburban can get 16 if you try. Is this normal?
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Well, think about it. On a turbo car when you free up the exhaust you are allowing more air to be forced into the engine. The ECU compensates by adding more fuel = worse gas mileage. Assuming comparable efficiency, more power will always mean worse gas mileage. That extra oomph has to come from burning more fuel. You might see better mpg under normal driving because the exhaust makes the engine more efficient, but when you floor it you can kiss that mpg goodbye.
Thread Starter
Registered User
Joined: Jul 2003
Posts: 68
Originally Posted by fusionsr
Well, think about it. On a turbo car when you free up the exhaust you are allowing more air to be forced into the engine. The ECU compensates by adding more fuel = worse gas mileage. Assuming comparable efficiency, more power will always mean worse gas mileage. That extra oomph has to come from burning more fuel. You might see better mpg under normal driving because the exhaust makes the engine more efficient, but when you floor it you can kiss that mpg goodbye.
Originally Posted by BAN SUVS
If you want better fuel mileage, use less throttle. There are no mods that can increase your fuel economy. (other than an NA swap )
)k&n filters dont increase mpg !?!?!? OMG
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