That had the potential to be a good motor. One of our drivers down in Arizona has the 15 ltr. in a dayCab ProStar and he loves it! says it pulls better than his Cumings 450 in his old ProStar
You want to hear the sad truth... You watch, the Maxxforce 15 will be one of those motors that never break down, good power, good economy and a good driving engine, bam, discontinued!!!