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post #1 of 8 (permalink) Old 11-05-2011, 08:47 PM Thread Starter
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Question Brand of diesel fuel?

It seems as if my 2008 6.4l is particular about The fuel I put in it. I only use brand named diesel but each of them causes differences in mileage and performance. My truck likes Exxon/Mobil and bp/amoco the mileage is good and the performance is up. When I fill with Shell,Chevron, or Racetrack the mileage goes down and the truck feels sluggish. I've tried many locations and the same holds true. Has anyone experience this? My friend with a 6.7 cummins can fill anywhere and his truck runs no differently why is that?
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post #2 of 8 (permalink) Old 11-06-2011, 07:16 PM
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Re: Brand of diesel fuel?

Since all the fuel in a given area comes from the same refinery, refined to the same standards, I don't see how fuel brand could possibly matter.

2000 F-350 SC 4x2 6 speed
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post #3 of 8 (permalink) Old 11-06-2011, 07:19 PM
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Re: Brand of diesel fuel?

Mine seems to clank more with exon and less with shell

2010 F-350, Auto,4X4, 4dr long bed, SCT/Gearhead, S&B, High Idle,Guages:boost,egt,trans, 2.5" Leveling Kit/Track Bar, PMF bars, 325-60-20's on 20x10 XD Revolvers
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post #4 of 8 (permalink) Old 11-09-2011, 05:21 PM
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Re: Brand of diesel fuel?

I get about 10% less mileage with exxon vs shell.

97 F-250 ECLB ZF5 7.3 4x4, 6637 Filter, MBRP 3" to 4" with 5" tip, HPO xover pipe, shimmed FPR, Boost and Pyro Gauges, PHP chip with stock, 60 hp, 80 hp, 140 hp, high idle, and no start
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post #5 of 8 (permalink) Old 09-16-2013, 09:56 PM
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Re: Brand of diesel fuel?

hey fellas, I drove my buddies 99 dually 1000 miles this weekend here in Texas...not very far actually....but the mileage really suffered with Exxon fuel. Normally I put Valero in mine but we were in Cisco TX and it was Allsups or Exxon. Boo on Exxon.

1996 F350 Crewcab lb 2wd auto, tommylift, now over 451k, 355k 3/31/15

1991 F250 Xtracab lb 2wd auto, sold again! Driveline and chassis is under a '65 F350 cab

1965 F100 styleside, power brakes, front discs, 390 all the goodies
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post #6 of 8 (permalink) Old 10-06-2013, 05:50 PM
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Re: Brand of diesel fuel?

All I run is Exxon fuel on my 7.3 and average 18.2 mpg unloaded on the highway with PHP tunes

2001 F250 7.3 4x4 - Reg Cab, Long Bed

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post #7 of 8 (permalink) Old 10-06-2013, 06:37 PM
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Re: Brand of diesel fuel?

I try to only get fuel at a shell near the house that has 45 cetane and the truck likes that the best. There is another shell right down the street from them with 45 and if I get fuel there I loose about 3-4 miles a gallon. There gas is the same way.

I had my buddy that has a Dodge try the fuel at the one I like and he said his mileage went up about 2mpg. Everywhere else around me has 40 cetane and truck doesn't seem to run as smooth.

2003 F-250 CCLB 7.3L
4" lift and PMF traction bar/block setup running 35s on 20x12s. Intake, exhaust, PHP Hydra w/ Gearhead tunes, gauges
2005 F-350 CCLB 6.0L
6" lift on 20x10s and 37s, studded, deleted, Powermax and Livewire with Quicktricks tunes, exhaust, intake (Wife's Truck)
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post #8 of 8 (permalink) Old 10-07-2013, 12:16 AM
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Thumbs up Re: Brand of diesel fuel?

Shell by far is better fuel. Always got better more miles per tank and ran much better.
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