Is the new superclean diesel too dry? - Truckers' Trucking Forum | Message Board

fmrbydaytkrbynight · **^ Top** #1 05.09.2007

Are most trucks running on the new 2007 diesel? I've heard of people running older model trucks on it, and saying it don't have enough sulfur to lubricate injectors, valves, and cylinder walls. I even talked to one guy who pours a quart of atf fluid in his every time he fills up, just to add some sulfur back to the diesel. Is there any truth to this?

Burky · **^ Top** #2 05.09.2007

If you are running an older diesel with a mechanical injector pump, like a Bosch, Bendix, or Roosa Master, then I think it would be wise to include something like Power Service additive into your fuel. Around where I live, my local fuel guy puts additive into all his farm fuel, since many tractors are running older style pumps. If you have a newer style engine, with electronic injector units on a common rail system, then you probably don't require any additives. The older engines have more spinning and contacting parts than the electronic engines do, and if you are running farm equipment, it's probably wise to treat both your on road and off road fuel at the recommended ratio, which is about 1 quart per 100 gallons.

Sad_Panda · **^ Top** #3 05.09.2007

Quote:

Originally Posted by fmrbydaytkrbynight

Are most trucks running on the new 2007 diesel? I've heard of people running older model trucks on it, and saying it don't have enough sulfur to lubricate injectors, valves, and cylinder walls. I even talked to one guy who pours a quart of atf fluid in his every time he fills up, just to add some sulfur back to the diesel. Is there any truth to this?

Oh god, ATF? I hope he enjoys cleaning out gummed up injectors, because that ATF will strip all the gunk in a fuel system and send it downwind. I use ATF to clean out rust in waterjackets on engines, just make sure to flush the system after you do that, otherwise you'll plug up your heater core.

PackRatTDI · **^ Top** #4 05.10.2007

It's not the lack of sulfur that causes the problem, it was the refining process to take out the sulfur that reduced the lubricity of diesel fuel. That was a problem in previous years, especially with the CARB 15 ppm diesel fuel that was sold in California before the national ULSD requirement. Supposedly the oil companies have done a better job with refining to lessen the reduction in lubricity, as well as using additives. But we won't know for a few years down the road when the engines have had a few hundred thousand miles put on them to know if it's really ok.

Burky · **^ Top** #5 06.10.2007

Actually, one quart of red colored ATF in 100 gallons or so won't discolor the fuel enough that the issue of the fuel being dyed becomes an issue. Still, I wouldn't run ATF, since that is not what it is defsigned for. Current electronic injectors running at high pressures are not quite as forgiving as the older mechanical ones were for contaminants, and if I were to put in anything, it would be a fuel treatment designed to be used as a fuel treatment. They are out there on the market, and easy enough to find.

RoadRanger · **^ Top** #6 06.10.2007

I put a 1995 with 900k on it on the road just when ULSD came out and am still running the same fuel filters it came with - no problems with stuff stripped off the tank or line walls. Just for yucks I've tried ATF and outboard motor oil. Neither seemed to do anything good or bad. ULSD has a lubricity standard they have to meet which the old fuel didn't - so it really should be as good or better.

25(2)+2 · **^ Top** #7 06.10.2007

ATF probably won't hurt anything, I was instructed to fill a fuel filter with it that had to be inverted before installation to prime it, the motor started and ran much better than it had with the plugged filter, the motor was a m-11.

Bio-diesel has been blamed for problems, probably unfairly, I fuel in MN sometimes and that is Bio-diesel by law, I also fuel at a place that runs up to 15% in IA, that also doesn't cause trouble with the fuel system, This motor is a 2001 12.7 Series 60. I ran farm tractors for, well, since 1967, during very cold weather, I ran straight No. !, there were engines that required straight No. 1 year around. It was felt that you needed N0.2 to keep the rotary and piston injector pumps lubricated. My tractors all had Roosa Master and later the replacement Stanadyne pumps. The early diesel pickups had injection pumps similar to these.

wallbanger · **^ Top** #8 06.11.2007

I have been putting Lucas in with ULSD, and haven't noticed any problems. Like RoadRanger said, the new fuels have to meet a lubricity standard that the old fuels didn't, so you are supposed to be able to go without any additives.
And, if you are going to add something, add an actual additive, not motor oil,ATF,Gear Grease,kerosene,etc.

onexcop · **^ Top** #9 06.11.2007

Quote:

Originally Posted by PackRatTDI

It's not the lack of sulfur that causes the problem, it was the refining process to take out the sulfur that reduced the lubricity of diesel fuel. That was a problem in previous years, especially with the CARB 15 ppm diesel fuel that was sold in California before the national ULSD requirement. Supposedly the oil companies have done a better job with refining to lessen the reduction in lubricity, as well as using additives. But we won't know for a few years down the road when the engines have had a few hundred thousand miles put on them to know if it's really ok.

Oops! You used "Lubricity" twice in the same paragraph PackRat. Just kidding. I love that word, slips right off my tongue. Don't laugh at me when I use lubricity in my next post. Oops, dang! I did it too.

Seriously though, excellent explanation!

PackRatTDI · **^ Top** #10 06.13.2007

Quote:

Originally Posted by onexcop

Oops! You used "Lubricity" twice in the same paragraph PackRat. Just kidding. I love that word, slips right off my tongue. Don't laugh at me when I use lubricity in my next post. Oops, dang! I did it too.

Seriously though, excellent explanation!

LOL lubricity! Lubricity! LUUUUUUBRICITYYYYYYYYY.

As for using ATF, you might run into issues if your engine uses a catalyst for exhaust aftertreatment. I think right now only CAT uses one for it's ACERT engines but eventually all the engine makers will be using some sort of catalyst and soot trap aftertreatment.

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