A lot of the SRT 8 owners are now using the Mobil 1 Turbo Diesel 0-40w oil. Seems the specs changed 3 or 4 years back and the new formulation is SM while the older formulation was SL. The reason for the change, apparently, was for emission purposes. So, who on this forum is using the 0-40 Turbo Diesel oil? The SRT 8 guys believe it is far superior and I'm considering using it in the xfire.

Les