I'm considering a 93-94 D-P with a 300 hp Cummins. I've heard that older diesels self destruct on this new Ultra low sulfur fuel, they need new
fuel pumps & injectors & maybe something else? Anyone know much about this?
I don't think it ever hurt the injectors as much as some of the rubber parts (like hoses and on rare occasions, injector pumps) developed leaks with some brands. The great fear that ULSD had so low of a lubrication that it would destroy everything in the fuel system never really came to pass. By now any problem area's of a rig that age have probably been repaired and new parts are ULSD compatible.
Scott, Grace and Wesly
2003 Dodge 3500 4x4, 6 speed Cummins (lightly bombed),
2004 Forest River 25RKS many, many mods.
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Removing the sulphur from the diesel fuel did not change the basic structure of the molecule or the BTU content of the oil.
any hype about using additives is simply that. because sulphur did nothing for us to start with.
I will add, that the #2 diesel fuel with out sulphur, is a lighter oil than the old fuel we had prior, thus it has less BTU per pound because it is refined more to get the sulphur out. and you will see a lower MPG using it.
* This post was
edited 03/24/12 12:46pm by Tom/Barb *
Oh yea.it will RUIN your motor in no time..............Well, it might take a bit of time.....well, OK I do not think it will hurt it much.
I have a 94 Cummins' Dually , and have over 300,000 miles on it, and have used it to transport RV's around the country, and this fuel has been ULS for a number of years.
I have seen a drop in M.P.G.- I have tried all kinds of "Snake oil", and use on occasion Power Service Diesel Fuel Supplement ..........so, I think you are safe in fuel regards.
The new vehicles, with high pressure fuel pumps............whole dofferent story
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Shortly after the ULSD fuel arrived, I developed a leak under the hood of my truck.
In the power steering pressure hose.
I really doubt the fuel had anything to do with it, but I can't prove it one way or the other!
But then, ever since I bought the truck, there has been a slight fuel seepage at the injector pipe connections at the top of the injector pump. Since the ULSD fuel, that seepage seems to have dried up. Coincidence? Probably, but I can't prove that, either.
The ol' beast just keeps thundering and rattling down the road, and bringing me home. No problems yet. But, it's just a youngster, a 1994 model, with only 276,000 (well, almost) miles on the clock.
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wolfe10 wrote: Caterpillar and Cummins engines ARE backwards compatible with ULSD and both manufacturers state that in writing.
The only issue I am aware of is a few gaskets on the Cummins lift pumps that can leak-- clearly no reason to stay away from the engine.
Arthur, pay attention to Wolfe10. Brett knows what he's talking about.
I also have a 1993 Cummins 300 HP in my coach with just over 100K miles. It runs great and the new ultra low sulfur fuel hasn't influenced it. So, don't worry.
Oh, by the way. The Cummins is only good for 300K before the pan should be dropped and bearings checked. LOL (That means it will outlast the house part of your coach.)
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