2008 4.30 fuel mileage? - Ford Powerstroke Diesel Forum

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post #1 of 30 Old 08-17-2007, 04:52 AM Thread Starter
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2008 4.30 fuel mileage?

I need to know what guys with an f-450 2008 with a 4.30 rear end are getting as far as mpg goes. I'm buying an f-550 and so I've got a pretty good idea on the 4.88 (8-9 loaded and about 12 at most unloaded). Any help would be greatly appreciated as I'm really needing to get this thing ordered.
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post #2 of 30 Old 08-17-2007, 06:12 PM
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It would be over 13% increase in RPM. That is significant. It would depend on the speed your traveling as too how much fuel you would use as compared to 4.3 gearing.

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post #3 of 30 Old 09-16-2007, 06:08 PM
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My 08 with the 4.30 traveling around 65-70 closer to 70 gets 11-12 unloaded 6-7 loaded with a 15000 pound trailer. doing 55-60, closer to 55 it gets 8-9 towing and 14 and change unloaded.
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post #4 of 30 Old 09-16-2007, 06:54 PM
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Our 450 with a 430 gear gets 9.5 mpg empty at 75 mph. That's ridiculous!
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post #5 of 30 Old 09-17-2007, 07:52 AM
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Lightbulb

I am getting about 8mpg load with trailer at 65mph and about 10mpg unload at 70mph and in town driving.

2008 F-450 6.4L PSD SD CREW CAB LONB BOX 172 WB RED 4X4 4.3 REAR END, SIRRUS SAT RADIO, LINX SPRAY IN BED LINER AND ACCESS ROLL-UP COVER.
PULL A 38FT FOREST RIVER SIERRA TRAVEL TRAILER 10,500LBS.
OLD TRUCK 06 F-250 6.0L PSD SC SHORT BOX 142 WB
RED FX4.ALSO HAVE HOW 05 F-150 CREW CAB 139WB AND IT'S BLUE AND FX4.
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post #6 of 30 Old 09-22-2007, 06:49 PM
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I moved my 5th wheel that's 10,000 lbs last weekend.

Hwy 83, 928 miles. Average was just over 9 mpg. Mileage is over 11,000.

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/ 2011 F250 4x2 Crew Cab /
Replaced "The Beast" 6.4L with 75,000 miles. Hated to see it go.
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post #7 of 30 Old 09-23-2007, 07:30 AM
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08 fuel milage

my 08 f350 crew srw is getting 8mpg around town empty load.
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post #8 of 30 Old 09-28-2007, 07:09 PM
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Has anyone here tried an aftermarket overdrive unit with the 4.30 gears? I concidering purchasing an 08 F350 dually with 4.30. I'm courious about adding an overdrive unit. Any comments?
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post #9 of 30 Old 09-28-2007, 07:52 PM
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Quote:
Originally Posted by bill29456 View Post
Has anyone here tried an aftermarket overdrive unit with the 4.30 gears? I concidering purchasing an 08 F350 dually with 4.30. I'm courious about adding an overdrive unit. Any comments?
ir your talking about that equipment that adds a second overdrive and a gear between each gear you prob would get better MPG on the highway but i know it cost over 2k not installed.. plus youll need a new shorter driveshaft.... if you do a lot of highway miles i would sat it would be worth it but if you dont save your money....
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post #10 of 30 Old 09-28-2007, 08:29 PM
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Here's the data on my 2008 F-250 King Ranch's fuel consumption from July - Sept.
This is from 7/miles - 2,396/miles since I purchased it.


Total Quantity Purchased: 205.364/gal
Total Cost: $603.15
Avg. Price: $2.934/gal
Average Fuel Economy: 11.52/mpg
Total FillUps: 11



9/21/2007 3.059 20.287 $62.06 2,396 Citgo Y -
9/12/2007 2.959 18.862 $55.81 2,176 Citgo Y 10.84
9/5/2007 2.959 20.279 $60.01 2,011 Citgo Y 8.75
9/1/2007 2.959 17.583 $52.03 1,726 Citgo Y 14.05
8/23/2007 2.899 19.520 $56.59 1,515 Citgo Y 12.00
8/18/2007 2.899 14.432 $41.84 1,270 Citgo Y 12.55
8/10/2007 2.899 17.356 $50.32 1,121 Citgo Y 10.32
8/2/2007 2.949 23.033 $67.92 935 Citgo Y 10.72
7/27/2007 2.899 15.391 $44.62 638 Citgo Y 12.89
7/22/2007 2.899 13.452 $39.00 460 Liberty Y 11.57
7/20/2007 2.899 25.169 $72.96 292 Liberty Y - Biodiesel (B5)

Last edited by alby; 09-28-2007 at 08:32 PM.
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