From Cummns at http://list.priceweber.com/cummins/td/lubricity.html FWIW:

"Lubricity is the fuel quality that prevents or minimizes wear in diesel fuel injection equipment. Diesel lubricity is largely provided by trace levels of naturally occurring compounds in the fuel that form a protective layer on metal surfaces.

In order to meet the Ultra-Low Sulfur Diesel (ULSD) specifications, refineries now utilize processes that not only reduce the sulfur content of diesel blend components, but also remove compounds that provide lubricity. This has led to some concern that ULSD fuel might result in lubricity problems for fuel injection equipment.

Should you be concerned about the fuel lubricity for your Cummins Turbo Diesel engine? The answer is no.

All diesel fuel sold in the U.S. since January 2005 must meet a fuel lubricity specification established by the American Society for Testing and Materials (ASTM). Any fuel lubricity additives necessary to meet this new specification are added by the fuel suppliers before the fuel hits the pumps. So you do not need to add fuel lubricity additives to your highway diesel fuel."

 

That looks like the little email I got the other day in my Cummins news letter. I know all is supposed to be well as far as lubricity goes but a little 2stroke oil makes me feel better so what the heck, I add it.

 

Yep, it is. I was going through my emails for the past few days and thought I'd pass it along.

I'm not going to stop using something either. A little Power Service when I fill up can only help.

I bet we're not the only ones who are going stop either.

 

I would think not. I bought some PS in the white jug the other day to try. I've always used the silver but thought I'd just try the other.

 

The white jug is for cold temps to prevent gelling and the grey jug is for warmer temps. It can't be colder in AL than it is here in MA right now. (although we're having an unseasonablely cold weekend)

 

It's been 100-105 the last 10 days, should drop into the 90's this week. Burrrrrrr.....

 

It may very well be a non-issue but I have decided to start adding 2 stroke oil and a few ounces of PS grey bottle with each fill up.

Just seems to me that almost every "improved" thing is NOT as good as the older stuff. ULSD seems to be one of these "improved" things that proves the point!

 

I run 2-stroke oil at 1oz. per gallon. Quieted the engine down A LOT! It seems to idle smoother and accelerate smoother. The first tank I ran it in I noticed a mpg jump from 14-16 in the city.

I run a little Power Serive or AmsOil injector cleaner every couple of tanks just to keep it all clean.