Stock MPG for 03 7.3L Auto - Ford Powerstroke Diesel Forum
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post #1 of 12 Old 11-27-2010, 10:35 PM Thread Starter
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Stock MPG for 03 7.3L Auto

Whats everyone with an 03 7.3L with an automatic getting in MPG? I haven't been able to get over 14.7 a tank, and thats with some freeway and some around the town.

2003 F350 Crew Cab 7.3L
- AFE Stage III Intake
- 4" Exhaust
- Goose neck setup
- Billet Grill
- 3 gauge A-Arm Cluster (Trans Temp, Boost, Pyro)
- DP F8 Chip
- Banks Big Head
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post #2 of 12 Old 11-28-2010, 10:37 AM
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my truck weighs around 7k and i get 14.7 in town and if i do mixed highway i get over 15 thats odd you're gettin that low. how much hwy? what speeds?? what gearing?
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post #3 of 12 Old 11-28-2010, 10:47 AM
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I have a 2wd with 3.73's and I'm getting 18 on the highway with Edge's 100 horse tune. Around town probably 16 or so

2002 3/4 Lariat,DIY,Zoodad,boost fooler,CCV,HPX,EBPV,Wicked wheel,Auto Meter gauges,Edge Evo II 100 horse,MBRP 4",203*
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post #4 of 12 Old 11-28-2010, 02:21 PM
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I have an 03 250 2wd all stock and I get about 15 around town and mixed about 18 and all highway if it isnt to hilly (which i live in FL) i get 21mpg without a load or anything.
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post #5 of 12 Old 11-28-2010, 03:22 PM Thread Starter
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Not much highway, maybe 100 miles or so?
I am not sure what gears i have, i bought the truck used and i keep finding things i didn't know it had.
FLRobert,
Is that with an automatic trans? Thats hella good.

2003 F350 Crew Cab 7.3L
- AFE Stage III Intake
- 4" Exhaust
- Goose neck setup
- Billet Grill
- 3 gauge A-Arm Cluster (Trans Temp, Boost, Pyro)
- DP F8 Chip
- Banks Big Head
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post #6 of 12 Old 11-28-2010, 04:09 PM Thread Starter
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OK so i was basing my MPG off what my display was telling me and i just read on another thread to not believe that thing if you had mods so i did the calculations and the best MPG i have gotten 17.3!

2003 F350 Crew Cab 7.3L
- AFE Stage III Intake
- 4" Exhaust
- Goose neck setup
- Billet Grill
- 3 gauge A-Arm Cluster (Trans Temp, Boost, Pyro)
- DP F8 Chip
- Banks Big Head
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post #7 of 12 Old 11-28-2010, 07:23 PM
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Can't complain about that 17.3 mpg if that is on hyw. If it is street driving, you have to drink a few beers for having a superb vehicle.
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post #8 of 12 Old 11-28-2010, 07:34 PM Thread Starter
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Its maybe 50/50

2003 F350 Crew Cab 7.3L
- AFE Stage III Intake
- 4" Exhaust
- Goose neck setup
- Billet Grill
- 3 gauge A-Arm Cluster (Trans Temp, Boost, Pyro)
- DP F8 Chip
- Banks Big Head
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post #9 of 12 Old 11-28-2010, 07:44 PM
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Quote:
Originally Posted by Wildfire532FB View Post
Not much highway, maybe 100 miles or so?
I am not sure what gears i have, i bought the truck used and i keep finding things i didn't know it had.
FLRobert,
Is that with an automatic trans? Thats hella good.
There is....or should be.....a tag on the differential that should tell you what gears you have. Since it's a SRW, you probably have 3.73s, if you had a dually, they'd probably be 4.11s.


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post #10 of 12 Old 11-28-2010, 07:55 PM Thread Starter
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OK cool thanks. It seems like the first owner really modded this thing out though so i wouldn't be surprised if it has different gears.

2003 F350 Crew Cab 7.3L
- AFE Stage III Intake
- 4" Exhaust
- Goose neck setup
- Billet Grill
- 3 gauge A-Arm Cluster (Trans Temp, Boost, Pyro)
- DP F8 Chip
- Banks Big Head
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