Diffs in mileage between trucks figured out? - Ford Powerstroke Diesel Forum
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post #1 of 3 Old 08-06-2011, 01:46 PM Thread Starter
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Diffs in mileage between trucks figured out?

I was reading some posts a while back about some folks getting good mileage out of their 7.3L and some not so. It appeared to be the same truck for the most part but some where getting in the high teens or better. I get about 17mpg's with my 99 F350 7.3L.

Mine is a early 99 model. Here is a video explaining an upgrade that can be done to increase my engines power. In short: the later 99 models and up to the 2003's have a different set of injectors which deliver about 30% more fuel to the cylinder. Increased power? absolutely- less mileage - more than likely.

I have no intentions of changing my injectors to the larger units as my mileage would drop, I am certain. And I am quite happy with the power my truck has, as is.

I know some folks don't like this guy, but it made sense to me. I may do the electronics upgrade some day though

Here it is

1999 F-350 SuperDuty
7.3L Turbo Diesel
Reg Cab 8' Bed
Superchip 1705
4" Factory Lift
198,000 miles
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post #2 of 3 Old 08-06-2011, 01:53 PM
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instead of getting late 99 stuff, just get the aftermarket/modded ones,

2006 Ford F250 CCSB FX4 6.0

1997 F350 CCLB 2WD 7.3
1999 F350 CCLB 4WD 7.3
2003 F350 CCLB FX4 6.0
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post #3 of 3 Old 08-06-2011, 01:55 PM
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yeah, and you can get better fuel economy with larger single shot injectors. some nice 160cc single shots would boost your mileage 1-2 mpg by most accounts.... you would of course need custom tunes for this.


First rig: e99 F250 CCSB 4x4 auto, white, 388k miles: traded in
Then: 02 F350 RCLB SRW 4x4 zf6, silver, 201k miles, THREW A ROD : traded to Jake
Now: 96 F350 CCLB DRW 4x2 auto, red and silver/grey, 266k miles: rusty but trusty
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