Why is MPG different in 03 vs 04

[codyGT]

Does anyone know why the MPG changed in 04?

My 03 GT = 18/26 M5

New 04 GT = 17/25 M5

 

[NasaGT]

1) You're driving it harder???

2) Are you using the Predator tune? Where you using it on the 03? Different tune = different results.

 

[Seraphitia102]

You're talking about the EPA mileage specification right?

 

[myponyrocks]

1) You're driving it harder???

2) Are you using the Predator tune? Where you using it on the 03? Different tune = different results.

hes qouting the sticker

I dont know whats different in the engine, its possible that after further testing they realized they were off a bit?

 

[40th GT]

My 04 with M5 gets 18/26 like the 03 stickers say. I'm not driving like a grandma nor am I flooring it everywhere, that's the mpg I get when I drive normally.

 

[PULMEOVR]

Isn't it to do with the change in the oil? 5w-30 vs. 5w-20, isn't that it? Just a guess.

Matt

 

[TripleBlk]

Does anyone know why the MPG changed in 04?

My 03 GT = 18/26 M5

New 04 GT = 17/25 M5

Hmm I thought the 04's have 3.55 axle ratio standard. If so, that's the reason.

 

[1low03gt]

The '04 brochure states 3.27's,nothing of 3.55's anywhere throughout the brochure.

 

[40th GT]

Yeah, 3.55s are just for Mach 1s and Cobras.

 

[DBMSTNG]

does it have the California polution crap on it? maybe the extra polution controls hurt MPG a bit.

 

[04DarkShadowGT]

I get around 24-26 mixed.

 

[tarch]

i heard about the different ratio in 04

 

[streetstang03]

im pretty sure that the auto 04 stangs have 3.55 gears. The 04 auto tested in MM&FF was spec'ed at having 3.55s.

 

[CanadaStang]

Good question. Darned if I know

 

[raykrv6a]

The build specs on my 04 GT say 3.27's are in it. I have a 5 speed and don't know if automatic's are different. The Cobra and Mach come with 3.55's.

 

[tomustang]

don't loose any sleep over it.