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low sulfer fuel in a 12 valve

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Old Sep 5, 2007 | 04:41 PM
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low sulfer fuel in a 12 valve

I've heard of a few pump problems using the low sulfer fuel. Not enough lubrication. Any comments?





1995 2500 slt 4x4 365,000 fuel plate, kn filter, 16cm turbo, 4" exhaust, air bags and compressor, air horn tst tranny with lockup
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Old Sep 6, 2007 | 02:46 AM
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The p7100 is oil cooled. Not fuel cooled. However some off the old pumps seals have been know to leak using ULSD. But this is only hearsay from my part. I've personnally never seen one leak.
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Old Sep 6, 2007 | 08:55 AM
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Just make sure your using one of the many over-the-counter proven additives and you will be fine.The harshness of the low sulfur fuel will eat away at orings and seals inside the pump.I use the Stanadyne Performance Formula and when I had a new P-Pump built recently and my pump man went through my old one nothing out of the ordinary was seen........Andy
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Old Sep 6, 2007 | 10:20 AM
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Originally Posted by Hammer
Just make sure your using one of the many over-the-counter proven additives and you will be fine.The harshness of the low sulfur fuel will eat away at orings and seals inside the pump.I use the Stanadyne Performance Formula and when I had a new P-Pump built recently and my pump man went through my old one nothing out of the ordinary was seen........Andy
Is this a known or proven statement?

I've read in the TDR mag's there is no issue with running the new fuel in our pumps.

But I aggree running additives just in case.
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Old Sep 6, 2007 | 11:29 AM
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ULSD has low lubricity... as stated before our P-pumps are oil lubed, so it's not as big of a deal with us as it is with many. One thing that I always keep in mind is the fact that one of the reasons, among others, that diesels have such great longevity is the fact that the fuel helps lubricate the rings, rather than combating the oil on the cylinder walls like gasoline does. I anticipate seeing a lot of diesel losing their rings much earlier than they have in the past with the previous diesel that we were buying. I always add a quart or two of 2 cycle oil to a tank of fuel just for a little peace of mind.
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Old Sep 6, 2007 | 06:35 PM
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Originally Posted by lgp9999
ULSD has low lubricity...
I have yet to see PROOF of this, the process to remove sulpher also removes some lubricity from the fuel, but the refiners have stated numerous times that they are aware of that and add lube back to replace it.
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Old Sep 6, 2007 | 07:24 PM
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refiners have stated numerous times that they are aware of that and add lube back to replace it.
As required by law the new ULSD meets the same lubricity requirements as the old fuel.
Me thinks the ULSD fears are exactly the same as when lead was removed from gasoline- unfounded.
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Old Sep 6, 2007 | 07:27 PM
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Bill, I agree. But I also add soybean oil to boost lubricity and also help U.S. farmers. Works for me.
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Old Sep 6, 2007 | 08:39 PM
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Originally Posted by infidel
As required by law the new ULSD meets the same lubricity requirements as the old fuel.
Me thinks the ULSD fears are exactly the same as when lead was removed from gasoline- unfounded.
Why did they use lead in gasoline again?
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Old Sep 6, 2007 | 08:54 PM
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I believe lead raised the octane level, and it also lubricated the exhaust valve seats.
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Old Sep 6, 2007 | 10:57 PM
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Sorry, but that was funny. We all like a well lubed exhaust seat.


I'm new here, and I'll be nice. I'm just lurking and learning, as I just picked up a 12V '98 a few weeks ago.
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Old Sep 7, 2007 | 02:35 AM
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Hmmmmm... you apparently have a dirty mind YY... you'll fit right in here.
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Old Sep 7, 2007 | 08:34 AM
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Install a good quality By-Pass filter for that dirty mind and y`all be fine. Works really well on the oiling system too.
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Old Sep 7, 2007 | 11:59 AM
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I wouldn't worry about it since only the 24v's rely on the diesel to lube the pump.

Ive never added any thing to my tank, but straight #2.
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Old Sep 8, 2007 | 08:09 PM
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Originally Posted by Robert Rausch
Bill, I agree. But I also add soybean oil to boost lubricity and also help U.S. farmers. Works for me.
Where do ya get the Soybean oil??
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