Fuel Mileage Difference - Ford Powerstroke Diesel Forum
6.4L Performance Parts Discussion What has or has not worked for you?

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post #1 of 34 Old 08-15-2012, 03:02 AM Thread Starter
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Fuel Mileage Difference

I installed my S&B CAI before any other mods to see what the difference would be. Bone stock I was getting 13.8 on the truck. Installed the CAI last night. Today I got 17.4. Even though this is the gauge on the truck giving me the numbers. Im sure sure it is accurate on just the diffence. Looking forward to see what the mini maxx and 5" dp back do.

----2012 F250 Lariat FX4


----2008 F250 King Ranch, Job 3, S&B CAI, H&S Mini Maxx, 5" DP back Diamond Eye....GONE... R.I.P

----2001 F250 7.3L, Superchips Flashpaq, 5" MBRP TurboBack, AFE Stage II, 35"x 12.50 BFG A/T KO,, Mickey Thompson 16.5 Classic II's, 2.5 Leveling kit, AutoMeter A- Pillar Gauge pod, Boost, Tranny, EGTs. Line-X Liner.....SOLD
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post #2 of 34 Old 08-15-2012, 03:12 AM
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I get right at 18 hwy with my set up. I'm getting 18.6 on the last 2 tanks since I got my 35 12.50s. If I'm in town and hwy mix I avg 15.5-16-5. I don't have a cai yet tho. When I still had my truck stock I might as well have poured my fuel in a ditch.


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2008 F-350 CCLB 4x4 H&S Mini Maxx, DPF and CAT Delete, Flo~Pro 5in DP back exhaust, Rough Country 3in lift, 17x9 Eagle Alloy series 079 rims, 35 12.50r17 BFG M/t
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post #3 of 34 Old 08-15-2012, 05:54 AM
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I wouldnt trust the guage in the truck, only way to tell for sure is hand calculating. My truck's MPG calculator is all over the place and ever right! on average it will read close to 4mpg's high, but not always.

2015 F350 Ruby Red Platinum, SRW CCLB, Color matched Ranchhands, rigids.


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post #4 of 34 Old 08-15-2012, 06:19 AM
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Lie o meter is never right or a good way to tell. Heck driving from Austin to Dallas my dash ended at 32.5. I have the picture to prove it. Filled up in Austin and reset my gauges. Still haven't reset them. I should have filled up when I got home to see what I actually got but didn't have time. Still haven't but the LoM is reading 29 as of this morning (a little over half a tank gone).


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post #5 of 34 Old 08-15-2012, 10:27 AM
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with my mods im getting 17 mpg driving 65-70 mph in 100* heat and 80%+ humidity hand calc.

08 F250 KR
08 F250 XL
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post #6 of 34 Old 08-15-2012, 10:42 AM
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Quote:
Originally Posted by blackcloud2k View Post
I wouldnt trust the guage in the truck, only way to tell for sure is hand calculating. My truck's MPG calculator is all over the place and ever right! on average it will read close to 4mpg's high, but not always.
Mines always dead on so long as it gets reset ever tank, but mines also stock.

2008 F350 FX4 King Ranch CC SB

Spartan 275 and 210 Tow as main tunes, AFE CAI


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post #7 of 34 Old 08-15-2012, 02:08 PM
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Originally Posted by Capt dong View Post
with my mods im getting 17 mpg driving 65-70 mph in 100* heat and 80%+ humidity hand calc.
That sounds exactly like my truck. And the exact weather I'm having. Where in this great state are you located capt?


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post #8 of 34 Old 08-15-2012, 05:53 PM
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That sounds exactly like my truck. And the exact weather I'm having. Where in this great state are you located capt?


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houston baby! hows the big d treatin ya?

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post #9 of 34 Old 08-15-2012, 06:35 PM
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How the hell are you guys getting 17 or 18 mpg. My 08 is stock and gets about 8.5 to 8.9 mpg. I would love just to get 13mpg.
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post #10 of 34 Old 08-15-2012, 08:24 PM
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I bought my truck about a month ago and have filled up 3 times. The truck guage told me respectivley 14.7, 15.3, and 11.2 (towing trailer). Hand calc told me 12.3, 12.5, and 9.8 (towing trailer).

Truck is stock fx4 cc. I bought an extended warrenty when I bought the truck so I still have 45k miles of warrenty. I dont want to risk void warrenty by doing a delete, but I would sure love to get 14-15 actual mpg.

2008 f250 CCSB FX4
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