[adiaireton8]

Apparently, you have not experienced the maintenance-free kind. Here's an example.

Mercedes diesels now have maintenance-free particulate filters on over 40 models.

I use B100 year-round, except Dec-Jan, when I go to 10-20% kerosene.

-A8

[Ostlandr]

Thanks! Will bounce that one off the folks at work- we're about to get hit with the new emissions standards for our medium and heavy duty trucks as well as the off-road stuff.
This could be what we're looking for.