MPG for 2002 F350 7.3 liter/ Suggestions? - Diesel Forum - TheDieselStop.com
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Upgrades and Aftermarket - 99 & up 7.3L Engine Upgrading or adding OEM or aftermarket equipment to your 1999-Up Super Duty or Excursion with 7.3L Power Stroke diesel engine. Please confine discussion of topics in this forum to those items that are specific to the 7.3L Power Stroke engine.

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Old 02-03-2007, 09:30 AM   #1 (permalink)
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MPG for 2002 F350 7.3 liter/ Suggestions?

My first time writing anything on this page. I have a 2002 F350 7.3 liter and I installed the Superchip, and I'm curious if anyone has any suggestions on how to get the best MPG possible and what other people are getting. Before I got the superchip I averaged around 12 mpg, but I live in Alaska and my vehicle is being ran at an idle quite often. Since I've gotten the superchip it has gotten better but I haven't went through a tank yet so I don't know the difference. Just looking for some advice and suggestions.

I appreciate any advice.
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Old 02-03-2007, 09:38 AM   #2 (permalink)
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Re: MPG for 2002 F350 7.3 liter/ Suggestions?

What other mods do you have? Edit you signature under 'My Home'. The best advise I can tell you now is keep it under 2000 rpm andif you have a pyro, keep the temp under 600.
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Old 02-03-2007, 09:48 AM   #3 (permalink)
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Re: MPG for 2002 F350 7.3 liter/ Suggestions?

I just bought the truck 2 weeks ago and shortly there after bought the superchip. No additional mods done yet.
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Old 02-04-2007, 06:44 PM   #4 (permalink)
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Re: MPG for 2002 F350 7.3 liter/ Suggestions?

Keep the rpm's at 1900/2000 hiway is the best start & idle little as possible.In the winter I always kill my fuel milage letting it idle & warm up.
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Old 02-04-2007, 07:34 PM   #5 (permalink)
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Re: MPG for 2002 F350 7.3 liter/ Suggestions?

mine i get 13 to 16. thats all in winter, summer it goes up to 14 to 17.
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Old 02-04-2007, 09:10 PM   #6 (permalink)
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Re: MPG for 2002 F350 7.3 liter/ Suggestions?

Don,t idle it more than 5 to 10 min, as it won,t warm up at idle anyway. [img]/ubbthreads/images/graemlins/smile.gif[/img]
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Old 02-05-2007, 01:24 AM   #7 (permalink)
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Re: MPG for 2002 F350 7.3 liter/ Suggestions? *DELETED* *DELETED* *DELETED* *DELETED*

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Old 02-05-2007, 01:32 AM   #8 (permalink)
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Re: MPG for 2002 F350 7.3 liter/ Suggestions?

I get 18 doing about 75mph with a chip intake and exhaust with 305's
I was getting about 13 mpg stock
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Old 02-05-2007, 07:50 AM   #9 (permalink)
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Re: MPG for 2002 F350 7.3 liter/ Suggestions?

[ QUOTE ]
I just got 23.2mpg with my set-up listed below with the cruise set at 70 mph for a 140 mile trip on the freeway...

[/ QUOTE ]


No offense, but I find that extremely hard to believe. Again, no offense meant. Is that hand calculating or using the overhead display?????
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Old 02-05-2007, 09:30 AM   #10 (permalink)
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Re: MPG for 2002 F350 7.3 liter/ Suggestions?

[ QUOTE ]
My first time writing anything on this page. I have a 2002 F350 7.3 liter and I installed the Superchip, and I'm curious if anyone has any suggestions on how to get the best MPG possible and what other people are getting.

[/ QUOTE ]
Don't worry about what other people are getting. There are too many variables to get a good comparision. You are not going to get the same milage as the guy in Texas.

Drag (resistance) is the biggest killer for fuel milage. You double the speed, the drag goes up by a factor of four.

[ QUOTE ]
Before I got the superchip I averaged around 12 mpg, but I live in Alaska and my vehicle is being ran at an idle quite often. Since I've gotten the superchip it has gotten better but I haven't went through a tank yet so I don't know the difference.

[/ QUOTE ]

I doubt the SCMT will make much if any difference to your milage. I didn't see anything measurable. It does make a nicer truck out of it though.

[ QUOTE ]
Just looking for some advice and suggestions.

I appreciate any advice.

[/ QUOTE ]

Your milage will change dramatically from winter to summer.

The only way to know what your real milage is, is to keep records. Track your fuel for a year and then you'll know. One or two tanks means nothing.

Over the last three years, I've averaged 12.3 US mpg.
Towing my 5er, a little better than 9 US mpg.
Running around Texas Freeways empty, somewhere in the 18 US mpg

My overall average is low compared to most. I rarely am on the highway empty. In fact, I have never gone through a tank of fuel running empty on the highway.
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Old 02-05-2007, 09:52 AM   #11 (permalink)
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Re: MPG for 2002 F350 7.3 liter/ Suggestions?

The justification for getting this truck was so I could get better gas mileage than my old truck (8-10 MPG). Now I am getting better gas mileage, but I've heard different people talk about how throwing an intake and a descent exaust, to let it breath, will make a drastic chance in fuel econ. I don't know much about products(good or bad), and common sense gets me through the maintenence on my vehicles. So if you guys have any good ideas on any additional things I could do to make the fuel econ better, nothing to expensive, I'd appreciate it. I'll be making a long trip from Alaska to Michigan this fall and I'd prefer to get all of this done prior to leaving.

Thanks guys, all of the input really helps. And by the way, I absolutaly love the truck. I finally have the truck of my dreams.
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Old 02-05-2007, 10:19 AM   #12 (permalink)
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Re: MPG for 2002 F350 7.3 liter/ Suggestions?

I get 15 1/2MPG towing my 18ft bass boat (est.3500-4000lbs) in the summer checked 3 tanks in a row 95% expressway at 72mph. I usually get 14-15 around town. I record mine religiously and know when its good or bad. Had a 93 Bronco with a 5.8L that only did 10MPG towing that same rig or 13-14 best ever highway. Remember everybody seems to state the best they ever got when they brag about a certain milage number. Fact is with a trip on the highway, never on the brakes, tailwind, high tire pressure, you're gonna get better than you normally get. And that seems to be when most people check it. If the thing idles in the driveway for a tank-ful you get 0MPG. These numbers I stated are with 80 Economy DP setting most of the time. Mine does better with the Tuner on if you can keep your foot out of it. Keep it under 2000 RPM.
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Old 02-05-2007, 10:52 AM   #13 (permalink)
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Re: MPG for 2002 F350 7.3 liter/ Suggestions?

Until just recently I have been very anal about keeping track of my mileage and comparing differences with modifications, and time of year. I live in Maine and noticed big differences between winter and summer mileage. You can tell from my sig what mods I have done, the biggest affect to mileage has been the addition of the wider tires.
I noticed a 2 mpg drop going to the bigger tires (from 18 Ė 20 down to 16 Ė 18), and have tried a lot of things since then to get it back without much luck.
I wonder how much affect the exhaust brake / valve has on winter mileage?
Have any of the members that have taken them off have noticed a improvement in mileage during winter driving? Personally I donít plan on taking mine off, I think it helps protect the engine from the cold and short drives.
The best advice I can give for getting better mileage is the same things for all cars, drive slower and accelerate easy and plan ahead when braking to a stop. Iíve got 146,000 miles on my stock brake pads and rotors. Watch your tire pressures the higher you can run them the less rolling resistance there is, donít go much over the max as rated on the tires, and watch for differences in how they handle in different conditions. I had to lower my pressures when the tires were new as they would bounce over rough road services, as they have worn down (about Ĺ) I have been able to bring the pressures back up some.
Good luck
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Old 02-05-2007, 02:34 PM   #14 (permalink)
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Re: MPG for 2002 F350 7.3 liter/ Suggestions?

I'm just not buying it...........................
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Old 02-05-2007, 02:57 PM   #15 (permalink)
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Re: MPG for 2002 F350 7.3 liter/ Suggestions?

Me neither. No offense. You gotta check it after a full tank. 6 gallons burned is not an accurate sample.

I've got 95,000 miles on mine and have calculated fuel economy at nearly every fill up since it had 16 miles on it. My girlfriend says I'm obsessed with it. My 2002 is basically stock, with a 6 speed and 4" exhaust.

Best I've EVER got was 20.2 mpg. Worse I've ever got (unloaded) was 15 mpg in the winter. Average around 17.5 mpg. Towing a 10,000 lb toy hauler trailer yields about 10.5 mpg average. This is corrected for the 295/75 tires.

Keeping the revs down and applying light throttle makes a huge MPG difference for me. Take your time. I shift at 1600 rpm or so unless I'm in a hurry. Speeds under 70 really help too, at least for me.
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