Is this bad mpg? - Ford Powerstroke Diesel Forum
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post #1 of 23 Old 09-24-2011, 04:19 PM Thread Starter
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Is this bad mpg?

Hello all, I've been doing all the maintenance I Can think of with my new-to-me 2002 crewcab shortbed PSD 7.3, 144k.

-I have done all new glowplugs and injector o-rings (7 of the 8 glowplugs were bad).
-Coolant flush, replaced with CAT ELC and added dieselsite coolant filter
-Oil change, 15w40 rotella
-New air filter, (still have stock intake)
-Transmission flush, 6.0 cooler
-new fuel filter

There was no fuel or oil in the coolant, when I did the flush.

I live in CO, and in my area its is very hilly, not flat roads by any means (which puts me in boost just to maintain speed when going up hill). I also have a 5 mile drive to work, the truck has barely been warming up by the time I get there according to the stock dummy-gauge. The truck sees 90% in town driving, and very little of it is long distances.

Having that said, I'm averaging 13.5 mpg. stock intake, stock exhaust, no chip as of yet.

I'm trying to decide if my MPG is reasonable given that the trip to work barely allows the truck to warm up (sometimes not at all), and that most of my driving is in hilly city areas, or if there is an issue. It doesn't smoke unless you're WOT (and then its not much at all, just a little black).

I've tried the lucas upper cylinder stuff as well as the supertech 2-stroke oil, and still don't seem to see much of a difference.
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post #2 of 23 Old 09-24-2011, 04:25 PM
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Thats what I get....so its fine...mostly. Whats your total hwy mpg?

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post #3 of 23 Old 09-24-2011, 04:27 PM
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That's about right if it's staying cold. What kind of rear diff gears?
I get 16.5 average



2000 F-350 Lariat Super Duty, Dually, CCLB, 7.3L
4R100, 2wd
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post #4 of 23 Old 09-24-2011, 04:28 PM
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For how you are using it, that's probably where it should be.. Where are you in CO?
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post #5 of 23 Old 09-24-2011, 04:34 PM
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I get 16-17 around town and in traffic. With you not getting the truck really warmed up, ypur mpg sounds about right.

Like Jerrod asked, what's you highway mpg?


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post #6 of 23 Old 09-24-2011, 04:47 PM
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sounds kinda bad to me.. ive seen 18-20 out of mine with the right conditions. but usually getting around 14-16.

2002 F-250 POWERSTROKE 4X4

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post #7 of 23 Old 09-24-2011, 04:55 PM
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Whats up Jeremy?!?! Nice to see a familiar face around here! I found an older one, and my last calculated tank was 19.48mpg with 4.10 gears Id say you need to take a good trip out of town and see what you get on the slab.... could be ****ty mpg just due to not being warmed up if i had to guess.

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post #8 of 23 Old 09-24-2011, 04:58 PM Thread Starter
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Sorry, forgot to mention f350, 3.73 rearend, 4wd. I also put in a 203* dieselsite thermostat when I did the flush. I'm in Colorado Springs.

I haven't gotten the chance to put a bunch of highway miles on it since I purchased it (from the original owner, maybe 2 months ago). The closest amount of data I have on highway stuff is: I went to pueblo and back 120 mile round trip, and (only on the overhead unfortunately) averaged 20mpg there (downhill) and it dropped to 15mpg by the time I got back (only reset before leaving, and didn't reset between; that was on the overhead).

Filled up, made the same trip towing my enclosed motorcycle trailer (probably 4k lbs) and finished the rest of the tank with city driving (unloaded) I measured 13.5. I made one trip up to the drag strip in Denver and averaged around 13 that trip as well. But now, just driving around town, I'm measuring 13.5 unloaded, 5-10 mile trips.
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post #9 of 23 Old 09-24-2011, 05:00 PM Thread Starter
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Quote:
Originally Posted by PhL0aTeR View Post
Whats up Jeremy?!?! Nice to see a familiar face around here! I found an older one, and my last calculated tank was 19.48mpg with 4.10 gears Id say you need to take a good trip out of town and see what you get on the slab.... could be ****ty mpg just due to not being warmed up if i had to guess.
Hey man! That sounds like really good mileage to me, especially with 4.10s - is that all highway?
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post #10 of 23 Old 09-24-2011, 05:10 PM
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Don't trust the OTC. Measure MPGs by hand



2000 F-350 Lariat Super Duty, Dually, CCLB, 7.3L
4R100, 2wd
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