Diesel fuel additives??

RAS43 wrote:

Perrysburg Dodgeboy wrote:

hone eagle wrote:
Sulfer is not ,never has been a lubricant .
just sayin

:h that's funny because that's not what I have read. Google ULSD and older diesels. There are studies showing injectors and pump failures have more tripled since ULSD became the standard. Just like unleaded burned exhaust valves and seats in cars designed for leaded fuel. Sulfer does add lubricity to diesel fuel, if it didn't why has pump and injector wear increased in older diesels?
Don

The process to remove the sulfur from diesel fuel also removed some of it's lubricating properties. Hone eagle is correct-sulfur is not a lubricant. As for injector/pump failures, the fleet I worked for did not see any of these issues on our older equipment when ULSD fuel was introduced. And we had a large variety of trucks, off-road equipment and locomotives. Not saying it didn't happen but I don't believe it was as big an issue as the internet reported. Could have been many different issues.
As for the unleaded gas thing, well that is a whole different issue. A lot of myth there too.

OK, yes sulfur is not a lubricant and yes I do know this. But the LSD (500PPM sulfur content) and ULSD (15PPM sulfer content) are not good for older diesels When they remove the sulfur they are also removing a good portion of the lubricating effect of the fuel. Cummins has said LSD can be used in the older diesels without any harm. They will not say the same for the ULSD.

I talked with them this morning and was told that "Cummins does not recommend the use of additives in 2007 and newer engines. She also said and she stressed this, "we do not discourage the use of an additive that increases the lubrication of ULSD in our older engines".

So take that for it's worth and it should be noted that Cummins sells an additive under the Fleetguard line. So maybe they are just trying to boost their sales right? I can tell you that I have used 2 cycle oil along with other additives in my truck and it runs smother, quieter and makes better mileage with additives then without. At the cost of about $7000 to have my engine rebuilt without labor, the cost of some additive is well worth the peace of mind. IMO

Don