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Old 06-03-2012, 09:10 PM   #1 (permalink)
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New member need help

Coefficient of drag: 0
Frontal area: 0 sq.ft.

how do I determine these?

what is my combined epa mileage? 2003 mustang gt manual

anything else I should know about the calculation tool?

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Old 06-03-2012, 09:51 PM   #2 (permalink)
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I googled all of those things for my car, and found several places that gave the same numbers. EPA.gov will give you your mileage ratings.
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Old 06-03-2012, 10:39 PM   #3 (permalink)
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F4LCON the ZX-3R - '13 Kawasaki Ninja 300 Stardust
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still cannot figure frontal area and epa combined, do i simply just combine and divide by 2? lol
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Old 06-03-2012, 10:49 PM   #4 (permalink)
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2003 Mustang EPA Gas Mileage Estimates - Gas Mileage Estimates for the 2003 Ford Mustang
Need Help! -- What do you think? | Mustang Forums at StangNet This says .36 Cd
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Old 06-03-2012, 10:56 PM   #5 (permalink)
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F4LCON the ZX-3R - '13 Kawasaki Ninja 300 Stardust
90 day: 57.71 mpg (US)

SON1C V3 Subaru BRZ Series Blue - '15 Subaru BRZ Series Blue
90 day: 18.23 mpg (US)

KNUKLZ V1 NA Miata - '90 Mazda Miata Base
90 day: 26.86 mpg (US)

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i found the 15/23 but is combined just the average? and i found the .36 cd, but what about the frontal area?
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Old 06-03-2012, 11:16 PM   #6 (permalink)
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Combined is usually NOT the average, it's a number derived from EPA tests. Combined means some highway, some city, and it's from testing that they get the number. You might have to search the internet awhile to find it.

Frontal area isn't super important for the fuel log, you can go without it and it won't hurt anything. Other than that you will just be searching a lot to find it somewhere.
Good luck
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Old 06-03-2012, 11:32 PM   #7 (permalink)
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Also: The EPA combined estimate is really just, well, an estimate. I don't think I've ever gotten an exact number of miles per gallon (IE there are always decimals in there.)
The EPA rounds their numbers, so it's just a guideline. You could probably just make up a number that sounds reasonable, there's no harm in that.
I don't think you'll be able to find a combined number because the EPA testing was different when that car was being tested than it is now. 18 or 19 MPG would probably be a realistic combined rating.
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Old 06-04-2012, 10:42 AM   #8 (permalink)
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F4LCON the ZX-3R - '13 Kawasaki Ninja 300 Stardust
90 day: 57.71 mpg (US)

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90 day: 18.23 mpg (US)

KNUKLZ V1 NA Miata - '90 Mazda Miata Base
90 day: 26.86 mpg (US)

SON1C V4 - '03 Ford Cobra
90 day: 11.16 mpg (US)

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thanks
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Old 06-04-2012, 08:23 PM   #9 (permalink)
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For that info I'd first recommend looking in our wiki:

Vehicle Coefficient of Drag List - EcoModder

What we have on the list is a SVT Mustang Cobra 1994 - 2004. Cd is .37 and Cda is explained at the top of the page. For that vehicle is 7.99.
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Old 06-04-2012, 08:56 PM   #10 (permalink)
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SON1C, combined EPA estimate for your 2003 Mustang GT manual is 19 MPG.
EPA website
BTW, welcome aboard, fellow Mustang owner.

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