I changed the main fuel filter this weekend. I have noticed a substantial positive performance difference, throttle response much better, idle's smoother, and I now don't lose any speed at all when going up very steep upgrades.

The filter was changed inside the recommended interval so it was not overdue.

Question for more experienced Dieselers, could beginning to use Redline have caused some of the "junk" to break loose and "clog" the filter. I began adding Redline about 2 months ago with positive results. I then began to suffer subtle performance degradation that was cured with the change in filter.

JCD