jafo

A lot of us own diesel-powered trucks (I have an '02 Excursion with a 7.3PSD) and I'm sure many of you put some kind of additive in your fuel. As you know, the coming of ULSD (ultra-low sulphur diesel) fuels has greatly reduced the lubricity in diesel fuel. The decrease in lubricity can and will over time do damage to your injectors. When I was working on jets full time, I used to get Jet A for free (daily sump fuel), which has NO lubricity in it, so I got used to adding lubricity agents to my fuel. I don't have that luxury with the Jet A anymore since I'm semi-retired.
I've been adding Diesel Kleen with a small amount (8 fl. oz) of 2 stroke oil to my Excursions and the VW TDI, and I was a little surprised by the results of this study I came across. I know guys that swear by Marvel Mystery (and others) as an additive, and look where it and some of the most popular wound up...........
Jim

http://dieselplace.com/forum/showthread.php?t=177728

CigDaze

Wow, great info. Thanks for the link.

I'm surprised that Stanadyne and Power Service ranked only mediocre. A good majority of folks I know use one or the other of those two. I've been using Power Service forever.

jafo

I was pretty surprised at those results as well- I came out OK on the 2-stroke as an additive, but the DieselKleen with cetane booster turns out to be mediocre at best.
Isn't it amazing that as bad as ethanol has turned out as a substitute gasoline fuel with its phase separation problems and all, biodiesel turns out to be the best lubricity additive of them all for diesels?
I wish I had it available locally- it should only be a matter of time.
Jim

LostinBoston

Biodiesel is a natural lubricant and great for diesel engines. You could just run pure biodiesel and have 0 sulfer in the fuel and it woudl be much better for your engine. Good to see biodiesel took took top honors.

fountain1fan

amen i love my bio.

Joe92GT

My first post here, I just have to reply.

There is NOT a decrease in lubricity. All diesel fuel for on road trucks has to meet ASTM lubricity standards. These are not merely guide lines!

This debate goes back and forth all over diesel forums. I'll just leave you with this:

Would the US government cripple its economy by destroying every single diesel truck on the road.. the trucks that ship 85% of our goods?

jafo

Joe- Welcome to the board!
You're right- this is a hotly debated topic, however the tests that have been performed such as the one I posted prove that straight ULSD does not have the same lubricity as fuel that has been treated with an additive such as bio and others. Most of the debates are ones of which additive people are using, not that they are using none at all.
The new age diesel engines are engineered to handle ULSD; engines such as the 444(7.3) were not. ASTM standards aside, there are a whole lot of folks that use an additive in diesel fuel- I just posted the link as an FYI.
Jim