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Gas vs deisel

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Old Apr 12, 2008 | 08:08 PM
  #1  
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Gas vs deisel

I have a 2000 350 crew with the 7.3 ps. As camper is parked, I really don't need the "beef" any more, but I need the 4 doors and 4wd. What kind of mileage do the (dare I say it) half tons get with the gasser? I get 17 with the PS. At current prices of $4+ for the oil and $3.25 for gas, I would need 13.5-14 mpg from the gasser (assuming I could trade even up). What are the gas motors capable of in stock form? Or am I better off searching for mods that will give an increase in mileage on the oil burner? To my way of thinking, if I can't save quite a bit in cost to drive per mile, I'm better off with the heavy built truck (can withstand more abuse,higher resale value, not to mention I LIKE IT). When I bought my first PS, oil was $1.05 and gas was $1.15. Oh, the good ol days.
 
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Old Apr 12, 2008 | 08:14 PM
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I get about 15mpg avg on my 02 F150 with the 5.4. Ext cab shortbed.
 
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Old Apr 12, 2008 | 08:25 PM
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I think the savings would be marginal at best... I vote stay with the PSD.
 
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Old Apr 12, 2008 | 08:33 PM
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I would keep the PowerStroke and do some mods to increase milage. If you're sticking with Ford, the half tons might do 15-16 mpg. Switch to GM and you could see 22 mpg with Active Fuel Management, but you won't have a heavy duty truck.
 
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Old Apr 12, 2008 | 09:26 PM
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Originally Posted by dmp437
I would keep the PowerStroke and do some mods to increase milage. If you're sticking with Ford, the half tons might do 15-16 mpg. Switch to GM and you could see 22 mpg with Active Fuel Management, but you won't have a heavy duty truck.
My brother has a 2007 Silverado with AFM. He gets considerably less than 22 MPG in his Crew Cab 4X4 with tow package (as an aside, AFM is only available on light duty trucks). We drive (each, separately) about 25-30,000 miles a year. We are a perfect test case, I have a 2007 F150 CC 5.4 4X4 with 3.73 and he has his Chevrolet Silvy. With AFM on cruise control he actually gets less MPG than with managing his speed on his own with his foot and cruise off. AFM causes the truck to move the RPMS up/down too much to maintain speed-this causes his efficiency to drop as the cylinders turn off/on. When the cylinders are off and speed drops then the truck increases RPMS's to maintain speed by turning cylinders back on. Given that the truck now needs higher RPM to achieve the set speed of the cruise more fuel is delivered-thereby increasing fuel consumption.

Granted we are in East Tennessee with a fair amount of undulating terrain and mountains thrown in.

Maybe in the flat land of the United States AFM will produce better results.
 

Last edited by jefftb; Apr 12, 2008 at 09:29 PM. Reason: Added information
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Old Apr 12, 2008 | 09:39 PM
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i have 3 f150's 01 to03,2 with 5.4's 4x4 , 1 4.6 4x4, 12 to 14 5.4's , 16 to 18 4.6

northern ca. elevation range 600ft to 7500 ft
 
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Old Apr 12, 2008 | 10:27 PM
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I think you should keep the ps because of the resale value and power adder opotions, a chip for a gas truck you get gains of 30 horse power max and with a power stroke you get somewhere around 105-150 hp gain.Also as i stated resale value, a gas truck does not keep its value like a diesel.
 
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Old Apr 12, 2008 | 10:42 PM
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Originally Posted by Snortwheeze
I would need 13.5-14 mpg from the gasser (assuming I could trade even up). What are the gas motors capable of in stock form?
I regularly get 14.something out of my F250 CC 5.4L 4.10 rear, so if that's your goal its do-able. I read the V10 guys reporting 13ish as well if you'd like to maintain the extra power.

I don't really buy into the resale value argument of the PSDs. Sure, they book for more but they also cost more up front when you buy them. So you really don't gain anything with the higher resale unless you forget the initial cost.
 
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Old Apr 13, 2008 | 12:25 AM
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i'd stay with the diesel. my uncle has a few 7.3's, and i agree that you wouldn't save much, and you'd lose ALOT of truck. since you've already got the diesel, i'd just hang onto it.
 
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Old Apr 13, 2008 | 12:54 AM
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Well.....since your truck is a 2000, I'll assume that it's paid for. You will have a huge payment on something else and it would kill whatever "savings" you are getting on a gasser for mpg. IF your truck is paid for......it's a no brainer to me, keep whatcha got
 
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Old Apr 13, 2008 | 05:21 AM
  #11  
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Keep the 7.3 PS.
My buddy has an 02 CC 4x4 7.3 and gets over 20mpg.
He has a superchips tuner, air filter, and straight pipe(no muffler, we cut it off and let the exhaust dump under the bed).
These mods helped alot as I believe he was getting 18 mpg before.
 
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Old Apr 13, 2008 | 07:46 AM
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keep your truck
 
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