mpg f250vsf350 - Ford Powerstroke Diesel Forum

 
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post #1 of 6 Old 08-17-2011, 08:02 PM Thread Starter
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mpg f250vsf350

just wondering why my 2008 cc 4wd with 35 inch tires dpf/cat delete and afe cai gets avg 15 mpg and my 2008 drw cc with 33 inch tires dpf/cat delete and afe cai gets avg 10 mpg. true f250 has 373 gears and f350 has 410 gears, but f250 also carries 1000 lb box in bed all the time. f250 is auto, f350 is 6 speed manual. any input? f250 has sct livewire and f350 has edge prog. also f350 rear main is starting to leak, had same problem on 99 7.3 that was also 6 spd, never had this problem on any of my auto trans. powerswtrokes. any input?
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post #2 of 6 Old 08-18-2011, 11:17 AM
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cause they r totally different trucks...... different tuners,, everything...i wouldn't expect anything to be the same


08 F350 MINI MAXX,5"FLO-PRO DPF DELETE, AFE INTAKE,HID'S,BFG A/T'S ON 20" BMF NOVAKANES,TIMBREMS,BLACKED OUT BUMPERS GRILL,STEPS RACING STRIPES,PAINTED HEADLIGHTS ,FABTECH LEVELD,RCX DUAL STABILISERS
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post #3 of 6 Old 08-18-2011, 04:48 PM Thread Starter
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they are not that different, some year motor and weight. only major difference is trans type.
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post #4 of 6 Old 08-18-2011, 05:36 PM
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Not to mention an added leaf spring in the rear, the sticker (lol) oh yeah and $$$$

2008 6.4L
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35"BFG M/T's
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Custom toolbox

2006 Megalite Extreme Hauler

2008 Raptor 700 Lots of go fast goodies!
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post #5 of 6 Old 08-20-2011, 11:28 AM
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I think the extra rear tires play a part in it. My brother's dually got terrible mileage stock and not near what everyone else claims with a Spartan and DPF delete on their SRW trucks.

'08 F-350, CCSB, Spartan, Diamond Eye 5".

'99 F-350, 4" lift, 315s, Western Diesel Quad Power, DIY Tymar, MBRP Cool Duals, custom blue/white paint. Totalled.
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post #6 of 6 Old 08-20-2011, 02:14 PM Thread Starter
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that makes sense, i just was wondering as the mpg in drw was not really helped much by dpf/cat delete and prog.( it really helped my srw by about 5 mpg)
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