Fuel mileage improvement - PowerStrokeNation : Ford Powerstroke Diesel Forum
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post #1 of 4 (permalink) Old 09-25-2009, 03:25 AM Thread Starter
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Join Date: Oct 2007
Location: Racine, Wi
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Fuel mileage improvement

The last few times I've been back to my parents place, I've noticed some fuel mileage improvements, particularly on the way there but not as much on the return trip.

Since Christmas of last year, I've installed an electric fuel system, D60, an intercooler, and switched to Schaeffer's 9000 5w-40.

I have logged every fill-up (167) since I bought the truck over 3 years ago.
Until recently, the best mileage I've had was 22.18 mpg on the 7th fillup after I bought it. Usually though it was around
The other day I got 23.05 mpg between Racine, wi and Lebanon, In. I used I294 around Chicago.

The last few trips have been:
July 4th
down: 21.26
back: 19.38

Labor day:
down: 20.54
back: 18.95

Sept birthday party:
down: 22.07
back: 20.66

The city mileage has also improved slightly from ~13 to ~14-14.5

You can see on the graph when I installed the 40 gal rear tank. Before that I was running only on the front tank.

Now, I have been having a problem with off-idle acceleration. If I'm not careful, the truck will totally black out the road instantly. This may be because of the intercooler causing boost lag, but I have not have the time during daylight to explore that yet. Once the engine gets to about 1600-1800rpm, it is just as responsive as it had been with no more smoke than I remember.
Due to the excessive smokiness on off-idle acceleration, I have had to back out of the pedal when starting to roll. This may be a factor in the improved mileage, but I know it is not all.

An intercooler and e-fuel increased my fuel mileage. Your results may vary.

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post #2 of 4 (permalink) Old 10-22-2009, 02:59 AM
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Location: south jersey
Posts: 877
Re: Fuel mileage improvement

always hard to keep,off the go pettle
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post #3 of 4 (permalink) Old 11-02-2009, 04:51 AM
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Re: Fuel mileage improvement

By how much did the electric fuel help?

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post #4 of 4 (permalink) Old 11-02-2009, 06:34 PM Thread Starter
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Join Date: Oct 2007
Location: Racine, Wi
Posts: 3,462
Re: Fuel mileage improvement

Short answer: Statistically undeterminatable.

Long answer: I only drive about 2000 miles after electric fuel was installed to the IC install, and the driving/idling varied greatly in that time, so I do not have a good baseline to compare to.

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