In a sense you are seeing them; the leaking delivery valve "O" rings that people are replacing. It is being blamed for alot is leaking seals on other type of fuel injection pumps. Luckly the inline pumps do not have a lot of seals that can leak that can be affected by the new fuel.

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84 300D, 82 Volvo 244Gl Diesel

Take a look at the chart on post #13 Spicer Lubricity Test. The shorter the bar on the chart the less "Wear Scar" there was when the addative was used and 2 stoke oil was 7th best.
http://www.peachparts.com/shopforum/showthread.php?t=203315&highlight=stroke+oil

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84 300D, 82 Volvo 244Gl Diesel

Incorrect. The sticker only displays the maximum sulfur content, not what is being pumped. It can still say Low Sulfur and be pumping ULSD. They only use the LSD stickers so they can delay getting their tanks inspected/tested.

The weakest part is the top end of the motor...the point of adding the 2cycle is to get the top end more wet.

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Wie lange wird Ihr Auto leben?

Lasting several hundred thousand miles longer than the average g@sser is "weak"?

2-cycle oil won't lubricate the top end any more than Diesel.

I'll probably get my IP rebuilt because of leakes resulting from being 21 years old. I'll take my chances running diesel, its lasted 21 years and 267k miles so I think thats pretty good.

Has anyone had a MB IP fail because of ULSD? We have been using it for quite some time now, and I know the VW guys are freaking out and seeing failures.

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1999 SL500
1969 280SE
2023 Ram 1500
2007 Tiara 3200

Yes, you will not need to rebuild your Mercedes pump (unless there is some other problem) as the only part that deteriorates due to the fuel and age are the "O" rings.
I have read that they have already been making gasket/seal kits that can take the newest diesel fuel.
I put one of these new seal kits into my Volvo diesel IP (similar to VW rabbit pump but 6 cyl). Because I insisted on changing 2 little rubber dampners that go inside of the pump I had to take apart the whole pump.
After assembly and installation on the engine I found that the timing is off (too retarded a lot of white smoke; but at least the pump dose not leak anymore). I have the pump apart right now trying to find out why the pump advance is not working as it is supposed to. (I thought that the pictures I took as I took the pump apart would be enough to allow me to fix it; but I guess I missed something.)

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84 300D, 82 Volvo 244Gl Diesel

When I added 2-cycle oil to my cars my idle actually got slightly louder. That makes sense as any motor oil is pretty low in cetane. To make a diesel engine quieter and still have complete combustion you need to increase the cetane. If your engine gets quieter by adding a low-cetane component like motor oil it means you have more unburned fuel coming out of the tailpipe. The best "additive" to increase cetane and lubricity is by far biodiesel. If that's not available I'd recommend an additive specifically designed for diesel fuel. I think cetane is a bigger concern than lubricity as ULSD is already additized to have "decent" lubricity, though it can be improved further with additives if desired, but I often find the cetane lacking in pure diesel for the altitude where I live. My cars definitely run quieter with additives or biodiesel compared to pure ULSD.

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2004 VW Jetta TDI (manual)

Past MB's: '96 E300D, '83 240D, '82 300D, '87 300D, '87 420SEL

IIRC BioD has a lower cetane rating than USLD, unless you add cetane boost to the BioD.

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RRGrassi


70's Southern Pacific #5608 Fairmont A-4 MOW car

13 VW JSW 2.0 TDI 193K, Tuned with DPF and EGR Delete.

91 W124 300D Turbo replaced, Pressure W/G actuator installed. 210K

90 Dodge D250 5.9 Cummins/5 speed. 400K

He's confusing cetane with combustion speed, two different things.

Cetane measures ignition delay and you're right that combustion speed is something different. Still, I think what I said is true. A low-cetane, slow-combusting substance like motor oil would probably result in higher emissions. Quieter due to less ignition delay (higher cetane) is good. Quieter due to slow-burning is not always good because if it's too slow it's going out the tailpipe.

No you don't recall correctly. Biodiesel definitely has higher cetane than petro-diesel. Petro-diesel in the US is typically less than 50, often closer to 40 actually. I've seen test results on B20 that showed around 54 cetane and even more for higher blends.

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2004 VW Jetta TDI (manual)

Past MB's: '96 E300D, '83 240D, '82 300D, '87 300D, '87 420SEL

I don't care, a rebuilt IP still costs about $1k online, or slightly less to have the local guys do it. It doesn't really matter why I rebuild it, costs the same. You still have to pull it apart to replace all the seals, check the mechanical parts and reset it.

I'm blaiming my oil leaks on old seals, I doubt the new diesel had anything to do with it. Heck the bottom seal has been wet every since I got the car. Craig's IP isn't leaking.

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1999 SL500
1969 280SE
2023 Ram 1500
2007 Tiara 3200

Are there any rubber seals inside a Mercedes IP other than the o-rings for the elements that connect to the injector lines? I don't think there are. If that's the case, why would anyone ever need to take an IP apart because of a leak?

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2004 VW Jetta TDI (manual)

Past MB's: '96 E300D, '83 240D, '82 300D, '87 300D, '87 420SEL

Went to a Bosch dealer couple of days ago,the lift pump repair kit now has 2 green o-rings instead of black ones..the lady was not capable of telling me the difference in material..any info on that?
On the 2-stroke oil-browsed some forums in Vaterland,my German`s very poor,but some folks there add 2-stroke oil in CDI engines ,actually one particular brand-Liqui/Lubro Moly 1052 semi-synth 2-stroke.
Found also this:
"Recommended diesel fuel additive: Liqui Moly 1052
Some Mercedes-Benz diesel engine engineers recommend to add some two cycle oil to the diesel fuel, in case the engine runs a bit rough due to a batch or so of poor diesel fuel quality in remote areas. In this connection Liqui Moly 1052 is usually mentioned. It reportedly burns clean, better than the diesel fuel itself, and can also be used on diesel engines fitted with particulate filter."
www.whnet.com/4x4
and...
http://www.pointedthree.com/disc/forums/showthread.php?tid=4313

.

If two cycle oil does not lubricate things when put in fuel
then why don't we run our weed whackers on straight gas.

Of course this stuff lubricates.
Thats what it is made for.


RichC

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When the power of love overcomes the love of power the world will know peace.
Jimi Hendrix