the 500 ppm stuff is still available around here, Speedway and Chardon Oil carry it. Get Go carries the 15 PPM fuel. my truck doesnt act much differently on either fuel. though i think the ULSD could have long term effects on wear.
i wonder how long it will be before they phase LSD out like they did leaded gas
I believe 2010 is the end of the 500ppm fuel. The epa is allowing a few of the small refiners to keep producing the stuff for a few more years so they can save up to make the changes to their equipment ( what, that HAVEN't been making enough money on their fuel to fix stuff???
In the mean time, you can still get the old stuff in a few places. Might as well run the new stuff with some additive, it does burn cleaner and sooner or later it's inevitable and the bullitin fom Chevron explaining the leaks being caused coming from changing the fuel types, so if your seals get used to the new stuff, chances are changing back and forth isn't going to help things.
-----Robert