So I was out running around town and the 240 was its normal slow self when all of a sudden I had a power increase for about ten minutes. Accelerating and driving I could tell a very very noticeable difference. And as fast as the change happened it was gone again. Its never done that before or again. Really though I was maintaining speeds up steep hills that I normally loose 7 mph on! The fuel filters are about 6 months old and I run power service diesel treatment in every tank. I figure it was probably something that might have gotten sealed or cleaned temporarily and would love to find and fix that so it has that power all the time! Any Idea? The car drives fine even at freeway speeds but it does not see freeway very much at all, it spends most of its time at 60mph. Its slow on accelerating and but for those ten minutes it really felt like a slow gas car.