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3800 Series II MPG?

P

PsychoGT

New member
Hey everyone,

I have an '03 GT 4-door and I am not getting very good mileage with it (21-24 mpg with lots of highway driving). I used to get around 25-27 mpg (or better if it was all highway miles) with an '03 Impala LS with the 3800. I bought the GP used so I don't know what the gearing is because I don't have the original paperwork. And I don't know what the gearing was on the Impala either.

I am guessing the gear ratios are different on the two cars and maybe that is why the difference in mileage? I am changing the sparks soon so maybe that will help. Also I had the K&N FIPK on the Impala and I have a Cold Air Induction CAI w/K&N on the GP. I am just curious what you guys are getting with your 3800s as far a mileage goes. Any tips on add-ons or driving styles would also be appreciated. Thanks.

PGT
 


Also cold air intakes will make you suffer on the MPG end. Hot air = more MPG's ......



Also how are you keeping track of you're miles?
 
TDCRacing said:
Also cold air intakes will make you suffer on the MPG end. Hot air = more MPG's ......



Also how are you keeping track of you're miles?
Click to expand...

I don't know how true that is. Maybe a HAI would be better, but when I had a stock GT my very first mod was a Wizair and I noticed my overall mileage jumped up by ~1mpg across the board.
 


Coogles said:
I don't know how true that is. Maybe a HAI would be better, but when I had a stock GT my very first mod was a Wizair and I noticed my overall mileage jumped up by ~1mpg across the board.
Click to expand...



Cold air is more dense with oxygen, therefore it will use more fuel to achieve the proper air/fuel ratio the computer is looking fo. Warmer air has less oxygen and will use less fuel to achieve the same ratio.

You should try switching to an open cone and see how many you pick up :cool:
 
But with denser air, you need less of it to make any given amount of power. Add to that less pumping loss from having a a more freely flowing intake, and a CAI should increase your fuel economy.
 
TDCRacing said:
Also cold air intakes will make you suffer on the MPG end. Hot air = more MPG's ......
Click to expand...

True in the winter, I lost about 1.5 mpg's in the winter running my wizaired, in the summer I gained .5 MPG,(both math, not DIC readings)


If you want a hai, just remove the box for the winter, and re-install in the summer
 
Yeah, I think I will just remove the clear lid and see what kind of mileage I get this go 'round. Thanks for the tips guys.

PGT
 


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