Mekanik Posted January 27, 2010 Share Posted January 27, 2010 Has anyone heard what the fuel economy should be? When I first heard that this engine uses reductant to clean the exhaust, I just assumed that it won't be a fuel pig like the 6.4L. The WBT mentions that it will still use fuel injectors to fire on the exhaust stroke to warm up the DPF. Is this engine supposed to use less fuel for the cleaning process? I'm waitlisted to take the class, and looking forward to it. Quote Link to comment Share on other sites More sharing options...
mrbudge Posted January 27, 2010 Share Posted January 27, 2010 The propeganda sheets I have read claim good economy, lets hope so. This truck is capable of a passive regen, so that should help. If it can use less egr to control nox because of the scr system then the exhaust temps should be higher out of the head and reduce the need for active regen. I think Volvo heavy truck is claiming they rely strictly on passive regen, so it is possible. Quote Link to comment Share on other sites More sharing options...
Cetane Posted January 27, 2010 Share Posted January 27, 2010 The propeganda sheets I have read claim good economy, lets hope so. This truck is capable of a passive regen, so that should help. If it can use less egr to control nox because of the scr system then the exhaust temps should be higher out of the head and reduce the need for active regen. I think Volvo heavy truck is claiming they rely strictly on passive regen, so it is possible. What do you consider good fuel economy? I get between 16-20 mixed cycle driving everyday. It has gotten worse lately with lengthy warmups in the morning and lots of idling during the day. That is a old P356 crew cab 3.73 4x4(no tcase)with a powertrain transplant. I think the 473's are slightly better with optimized axle ratios and aero improvements. I am not sure what you guys mean by passive regen. If you mean regen without post injection then you won't see much unloaded. I run around 250C on the highway which is way too low for passive. Volvo can probably get away with it because their customers are always loaded so the exhaust temps are high enough. Regen frequency should be better than the 356's but I wouldn't say there is less egr than before. The SCR is not a be-all-end-all solution. I can be driving down highway converting 99.9 percent of the NOx and decide to whip out and pass somebody. Shortly after I start pedaling in the juice the aftertreatment efficiency goes down. We have to make sure the feedgas levels are low or we won't make the strict emission targets. Quote Link to comment Share on other sites More sharing options...
cbriggs Posted January 27, 2010 Share Posted January 27, 2010 Quote: you won't see much unloaded Thats the problem. As grocery getters they probly wont do so well. We may find they get as good of mileage loaded as they do empty. ( if they are capable of passsive regen when loaded and worked HARD) Quote Link to comment Share on other sites More sharing options...
Mekanik Posted January 27, 2010 Author Share Posted January 27, 2010 What do you consider good fuel economy? I get between 16-20 mixed cycle driving everyday. I would consider that good fuel economy. I think a lot of 6.4L owners get 9-10 MPG, and I think that's pretty bad. Quote Link to comment Share on other sites More sharing options...
mrbudge Posted January 28, 2010 Share Posted January 28, 2010 Passive regen is without post injection. Unloaded or idling, lack of exhaust heat will be a problem, especially here when it is 30 below and they are idling all day. I remind people that when they idle they get 0 mpg. The doc will create some heat for dpf, but unloaded I doubt it will be enough. I hope that one thing the scr will do is reduce the amount of egr required, increasing the in cylinder temperatures and therefore increasing exhaust temperatures. I guess we will find out soon enough. I am trying to be optomistic, by my realistic side is saying otherwise. Quote Link to comment Share on other sites More sharing options...
Fredsvt Posted January 28, 2010 Share Posted January 28, 2010 Of the 6.4s I service I see every one but 1 at 7.8 mpg average on the display. The drivers never reset it, so it's over the life of the truck so far. These are 3 F550 drill rig trucks. The last 1, is constantly idled, much against what I've told them, it has a avg mpg of 4.5. This is a F350 utility body. Now that's awful. Quote Link to comment Share on other sites More sharing options...
Mekanik Posted January 28, 2010 Author Share Posted January 28, 2010 We have a customer that hauls horses and has a 2008 6.4L. He also has a Freightliner. can you guess which one is more fuel efficient???? Quote Link to comment Share on other sites More sharing options...
cbriggs Posted January 29, 2010 Share Posted January 29, 2010 What year is the frieghtliner though. I have heard the new commercial transports with egr and dpf arent very good on fuel as well. Quote Link to comment Share on other sites More sharing options...
Mekanik Posted February 8, 2010 Author Share Posted February 8, 2010 I'm not sure, but is older than his 6.4L Quote Link to comment Share on other sites More sharing options...
Keith Browning Posted February 8, 2010 Share Posted February 8, 2010 I asked the in dealer training guys what their truck was getting and if I recall correctly the IC had 15.2. This is a brand new truck with about 1000 miles on it. Quote Link to comment Share on other sites More sharing options...
Aaron Posted February 9, 2010 Share Posted February 9, 2010 I went on about a 600mi round trip this weekend, averaged 17.7mpg hand calculated in my 08. Quote Link to comment Share on other sites More sharing options...
cbriggs Posted February 9, 2010 Share Posted February 9, 2010 Whats that in l/100km Aaron? ( holy shit, did I just ask that?) Quote Link to comment Share on other sites More sharing options...
DwayneGorniak Posted February 9, 2010 Share Posted February 9, 2010 Proud to be Ukrainian A recent study conducted by Kiev University found that the average Ukrainian walks about 900 miles a year. Another study by the Ukrainian Medical Association found that Ukrainian men drink, on average, 22 gallons of alcohol a year. This means, on average, Ukrainians get about 41 miles to the gallon. Kind Of Makes You Proud To Be Ukrainian! Whats your mileage??? Quote Link to comment Share on other sites More sharing options...
Keith Browning Posted February 9, 2010 Share Posted February 9, 2010 That is funny! Where did you get that statistic? Quote Link to comment Share on other sites More sharing options...
DwayneGorniak Posted February 9, 2010 Share Posted February 9, 2010 LOL. I had it emailed to me. And being that I am of Ukranian descent, I just had to share this little bit of humor. I don't think my mileage is quite that efficient though. I'm more like an alcohol powered funny car. Quote Link to comment Share on other sites More sharing options...
Jim Warman Posted February 10, 2010 Share Posted February 10, 2010 Dangerous analogy, Dwayne... makes us wonder if you mean it's all over in under 6 seconds Oh, man... that was mean.... I can feel a payback a-comin'.... Quote Link to comment Share on other sites More sharing options...
LARRY BRUDZYNSKI Posted February 12, 2010 Share Posted February 12, 2010 Dwayne.....Ukrainian.....You must eat cabbage to so how does that work into the mileage figures. You must be full of gas to start..... Quote Link to comment Share on other sites More sharing options...
Jim Warman Posted February 12, 2010 Share Posted February 12, 2010 Surprisingly, I'll bet you a buck 85 that Dwayne is a meat and taters kinda guy.... I'm from the auld sod ( Britain ) but there are times I like to settle in for a good feed of holupchi.... My best friend is a bohunk (obviously, I can call him that because he IS my best friend) and I often help him with his sideline catering business.... A full cours dinner for 200 or 300 would be "average". Anyway.... this guy has all of his Grandmothers recipes..... And they would send anyone with a name ending in "ski" to orgasmic heights.... F*ck... now I want a bowl of borscht.... Quote Link to comment Share on other sites More sharing options...
Aaron Posted February 13, 2010 Share Posted February 13, 2010 I'm hungry. But this should come as no surprise, to those of you that know me. Quote Link to comment Share on other sites More sharing options...
STROKERTEC45 Posted April 14, 2010 Share Posted April 14, 2010 Back to fuel economy,I'm in Detroit training center now(Allen Park)for the 6.7L class. The two instructors I know here tell me on a trip to Cincinnati Oh. for a train the trainer class, driving hard while making recordings for the class they averaged 17.8 mpg sounds pretty good. Quote Link to comment Share on other sites More sharing options...
Aaron Posted April 14, 2010 Share Posted April 14, 2010 On a pen and paper calculation, or by the meter on the dash? Quote Link to comment Share on other sites More sharing options...
STROKERTEC45 Posted April 14, 2010 Share Posted April 14, 2010 Oh sorry, On the meter on dash Quote Link to comment Share on other sites More sharing options...
Cetane Posted April 27, 2010 Share Posted April 27, 2010 I have been averaging 18.5mpg in my CC/SB 4x4 3.55. I took one of the other trucks home today(RC/LB 4x2 3.31) and got almost 27mpg on the same cycle. 50 miles total, mostly highway with plenty of 45/60mph slowdowns for construction(Thanks MDOT). Thats with a production cal with regen off so it wouldnt screw up my mileage. With the 3.31 truck you can cruise just above 40mph on the back roads and the engine is right at 1000rpm. If I get a chance I want to run some miles that way and see what I can squeeze out of it. Quote Link to comment Share on other sites More sharing options...
Jeff_E Posted April 28, 2010 Share Posted April 28, 2010 Cetane, do you get to drive any 6.2 Super Duties? Any idea what kind of mileage they get??? Quote Link to comment Share on other sites More sharing options...
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