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Running offroad diesel in the 6.4

24K views 41 replies 27 participants last post by  TheNomad 
#1 ·
Anyone tried running the offroad diesel in the 6.4? My buddy owns a construction company and runs this offraod diesel in his 2008 duramax and everything runs fine. H e has done this on his 2007 as well and they have all the epa equipment like the 6.4. Just a thought as offroad diesel is $3.25.:dunno:
 
#2 ·
Only if it is ULSD.

It's all the same diesel, just with a concentrated dye. It just depends on the sulfur content.
 
#4 ·
They pretty much got ya covered for answers, as long as it's ULSD the fuel itself is fine, but it is NOT recommended to run it on the run, cause if you get caught just once, it is heavy fines that outweigh the cost difference.

And it is Federal penalties, not local. The fines are for avoiding the road taxes that are included in the fuel prices.
 
#7 ·
fines definatly arent worth the savings ,ive seen plenty of 6.0 with offroad in them, but the only 6.4 ive seen running offroad fuel i put a engine in it at 24,000 miles , cant say the fuel caused it but i dont think it was helping any , i also think that the tolerances in the pump and injectors cant tolerate offroad diesel for long
 
#14 ·
around here they do as a matter of fact , and as eric said , they are checking more private rigs just for that reason ,i dont see anything funny about that , take a 6.4 in the dealer under warranty and you bet the tech wont fix it under warranty with offroad diesel in it , not as bad as they are to work on anyway , alot of techs just look for a reason to make the repair not covered, if you saw what warranty pays to do most of the jobs under warranty ,trust me it doesnt pay crap
 
#9 ·
How are officials going to know what is in your fuel tank? Are they going to set up road blocks??

They can dip your tank, especially at auctions, or any time they pull you over, so yea they will catch ya.
 
#10 ·
Yes they do.:nod:

DOT officials set up road blocks and random checks. Used to concentrate on the road haulers, but are now hitting even the private rigs with more and more of them running offroad.

They use a wick type device to dip the tank, if you even have a smidge of dye show, your busted. It takes several tanks to flush out all the dye.
 
#11 ·
There is a way to trick them. You can run a fuel system similar to the ones the Super Dutys in the 90's used. Run one line from the stock tank, and another from a tank full of red diesel in the bed.

I've seen it done a lot down here in older trucks, so I don't see why you can't do it in these.
 
#15 ·
one of my customers has 6 trucks set up like that all 6.0 , he thought the same thing till one of his guys just got busted , the irs showewd up at his facility and he ended up with 21,000 dollars in fines and he had 24 hours to get them all drained ,they came back and rechecked to make sure he did what he was supposed to the way he got caught was the dot man actually went under his truck on the side of the highway and saw his extra lines running from the tank to a switching valve from his auxiliary tank, and it was hidden fairly good, the dot is getting more aware of all the tricks
 
#13 ·
thats funny. thats what we were talking about. having your transfer tank piped in to the fuel lines and bypass the real tank. but also you cant get introuble for just having the dye in your system, only if you have it running on it currently. because when i am on the farm or big construction sites i will run red, i just make sure i use it all before the street and put regular back in. i have been dipped and it turned a shade of whatever they want, and i just explained to him what i do, and he said thats fine. just dont pull on the street with it in your tank
 
#16 ·
AINT WORTH IT IN MY OPINION!!
 
#19 ·
Adam the out of pocket repairs gotta suck, thats for sure.
Eric you arent kidding about the paychecks in the tank its getting rediculous
 
#20 ·
It isn't worth it... yet! The way fuel prices are going up so fast the, red dye is not too far behind it. It used to be alot cheaper, but not so much anymore. They are now going as far as checking fuel filters and injectors in California!!!!
 
#26 · (Edited)
We have had the checks in PA around Philly for a while. Mostly they look at vehicles that are obviously construction related. I know they have stepped up looking. I have seen signs in Jersey that say all diesels must pull over, mostly where off road fuel is readily available. I have also seen fuel check stations in northern Florida, again where off road fuel is readily available.

Just went and looked for off road for our equipment. I actually paid less for road fuel than I could for off road at a standard station just by knowing which stations generally have the best prices. $4.69 for off road at 3 stations, road fuel between $4.67-$4.99. I could have done better if I ordered 200gal+ delivered ($4.49), but have nowhere to store it right now, as the big tank has road fuel in it.
 
#27 · (Edited)
Make sure you know what the sulfur content is. There is LSD on the market until 2010. The difference in Kansas is 50 cents per gallon. It would take a lot of gallons to break even on the fine.

We have a license for the state of Texas. We file a report for diesel fuel tax. It suggests that one could use off road fuel while running off road and report on road use (with the license). We don't use the vehicles on road so we have never paid additional tax. The form however is set up to report off road fuel purchased, how many miles driven on road with it, etc.

If you live on a ranch or farm you may be able to do this to an extent. There is a hassle to filling out these forms and such. The easiest thing would be to buy taxed fuel and file for an off road use refund. This way you know what your running is good for the truck.

If your contemplating using it illegally don't.
 
#28 ·
It’s just the prices of the taxes, federal, state and any local on the fuel.
Take lots of fuel to offset that $25,000 and do not forget your time to deal with it.
Seeing every level of government is short on taxes collected no surprise in the increased checking every tank.

Its time to cut the list of new posting off again. :dunno:
 
#31 · (Edited)
Did you change the fuel tank or anything?
 

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#33 ·
you know what sounds like big brother to me FTP!
 
#34 ·
I have been stopped for inspection in one of my old trucks. They dipped into the tank and had a mirror to look under the truck for extra fuel lines. They were only pulling over private trucks. No commericial. Large fine to refuse the test also and then they impound your truck anyways. From what I've been told it takes 6-10 tanks to get the dye out. Never would use it.
 
#38 ·
I don't think the low sulfur fuel affects the pump. It more has to do with making more soot which in turn fills the dpf up quicker on a stock truck. This in turn would lead to more regens and possibly plugging the dpf. On the plus side, I've always heard the low sulfur diesels has more lubricating abilities than ulsd which is why they recommend additives. Not sure myself on this but I've always gone with the info and used additives. Up here I think all the fuel, including off road, is ulsd.
 
#36 ·
I think has to do with the dpf. The low sulfer burns "dirtier", more soot, than the ultra low sulfer. Therefore it clogs up the dpf more than it can handle. Maybe someone will chime in w more info.
 
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