4.6L (1996-2004 Modular) Mustang Technical discussions on 1996-2004 4.6 Liter Modular Motors (2V and 4V) within.

MPG w/ 3.90's

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Old 05-06-2006, 02:42 PM
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04 Red GT
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Default MPG w/ 3.90's

What kind of MPG are you getting w/ 3.90's? Please chime in.........................
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Old 05-06-2006, 02:51 PM
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spederman
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Default RE: MPG w/ 3.90's

04 red, i just ordered my 3.90's. So i wont know till next weekend. But how do you like your 3.90's? Can you tell me what you rev at like 3k? Do they have awesome pull like supposedly 4.10's do but a bit better gas mileage?
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Old 05-06-2006, 02:55 PM
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04 Red GT
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Default RE: MPG w/ 3.90's

Just had them installed last week, still on the "break in" period. At 70 mph I'm doing like 2200 RPM, thats the fastest I've been since the install. And so far no gear whine with the Pro 5.0's....
ORIGINAL: spederman

04 red, i just ordered my 3.90's. So i wont know till next weekend. But how do you like your 3.90's? Can you tell me what you rev at like 3k? Do they have awesome pull like supposedly 4.10's do but a bit better gas mileage?
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Old 05-06-2006, 04:49 PM
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NeFiLiM
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Default RE: MPG w/ 3.90's

i dont think theres gona be much of a difference at all between 4.10s and 3.90s in gas mileage
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Old 05-06-2006, 05:55 PM
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97targa
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Default RE: MPG w/ 3.90's

maybe 13 city and 15 highway
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Old 05-06-2006, 06:06 PM
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wwmost
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Default RE: MPG w/ 3.90's


ORIGINAL: 97targa

maybe 13 city and 15 highway
get outa hear! i have 4.10's annd if i am on it the whole tank i dont get that bad of gas mialige
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