6.4L Power Stroke Engine and DrivetrainDiscussion of the 6.4L Power Stroke diesel engine and drivetrain in the 2008-Up Super Duty trucks. No gas engine discussion allowed except on transmissions and drivetrain that pertain to all models. Please confine discussion of topics in this forum to those items that are specific to the 6.4L Power Stroke engine.
As the title suggests, does anyone know the fuel consumption of the 6.4 motor while at idle as stated in gallons per hour?
Need to know for a proposal for some work where we will have trucks sitting idle for long periods.
Thanks in advance for your help.
Sorry I don't have the fuel consumption at "idle", but I'm always curious why someone needs to idle for extended periods.
Diesels do not like to idle. They work best in their power band with little variation, but "idle" isn't it. If they need to sit for long periods used as a PTO, they should be idled up to about 1250 rpms (min) or what the PTO requirement will be. A 6.4 will regen MUCH more frequently at idle than in it's power band. So figure your fuel consumption at something over 1200 rpm.
Feb 03 6.0 Silver F-250 SD SC XLT long box, 6-spd 3.73ls, Fx4, Stock, Spray-in liner, Contico box.HARPOONED.
I don't know about "gallons per hour" because there are way too many variables..... temp, rpm, electrical load, probably some I forgot....
Diesels like to work... they like to have hot combustion chambers.... they weren't built as noisemakers... they were built to do stuff.... Does someone buy a mine truck because they like noise? No... they want to move dirt... lot's of it.. lot's of it all at once.
FWIW... there are a lot of BIG diesels that get to idle for long periods of time.... they get to do that because they are friggin' hard to get started.... not because they sound nice sitting outside...
Oops. nearly forgot.... that works out to zero miles per gallon....
I bet it's less then 1 gal per hour because I have to sleep in mine lot's of times inbetween jobs while traveling away from home and it doesn't burn much at all after hours of idleing.
2011 F350 Lariat DK.Blue/Silver,Black Leather Crew Cab,Short Box SRW. Supplemental Heater,3.55 ELD, Remote Starter. Used for hauling 16ft x 8.5ft. Work Trailer , 8ft. Fisher Plow, Lance 820 truck camper for those days I can get away.
I get about 350-400 mpg, so if an hour of idle equals 33 miles, then after 11 hours I would be on empty? Seems like that wouldn't be right. I've slept in mine overnight in the cold - 8 hours of idle - and haven't spent more than a 1/4 tank. I'd like to know a definitive answer though. Not saying you're wrong, I guess Ford would know better than anyone else.
2008 F250 XL Crew cab, manual 4x4, 6.4L, Job 3, TorqueShift, w/ Decor group, Camper Pkg, Off Road Pkg, LWB, Power Equipment Group, Tow Command, Knapheide Utility Bed with sliding top. Built 2/5/2008 & Purchased 9-1-08
08B07 Flash 1-16-09
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Radiator (end cap leak) @ 34,100 miles 11-19-09
11B23 PCM Recalibration 4-11-11
Hydroboost Replacement (leaking Power Steering Fluid) @ 82,866 miles 7/25/11
Upper & Lower Hoses (new design) @ 90,000 miles 11/10/11
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New BF Goodrich Rugged Trail T/A tires after 101,400 miles on the original BF Goodrich Rugged Trail T/A tires 3-27-12
New Batteries after an original boiled over at 105,300 miles 5-13-12
Fuel Pump Replaced (frame rail) 131,534 miles 4-5-13
6.0/6.4 Fuel Economy:
Ford vehicles equiped with the 6.4 PowerStroke diesel are not rated for fuel economy by the EPA. If economy is in question, a boost test should be performed. If boost reaches 22-25 PSI in third gear, wide open throttle under load, then the engine s operating normally and no economy related repairs need to be performed. If not in specs, then the engine will need to be diagnosed--check sensor reading, VGT and EGR operation, fuel pressure and quality, crankcase pressure, intake or exhaust restriction, exhaust or CAC leaks.
Fuel economy will be affected by many factors, including: excessive idle time (one hour equals approximately 33 miles of driving), fuel quality and blend, ambient temperature, driving habits, vehicle use, towing, loads, add-on accessories. Broadcast Message 1271, 4450, 6989
Actually, it does seem high, by their numbers you would burn a gallon and a half of diesel in an hour (assuming you get 20mpg) of idling. I don't know i would bid it at .75 gal per hour and if you are high then you will break even with the more frequent oil changes and regen cycles.
Last edited by rock_doctor; 05-03-2009 at 09:33 PM.