Anyone running the FS 2500 on a 6.7? if so do you think it is really keeping the oil cleaner?
about 4-5 years ago i experimented with one on a neighbors 7.3L After 3,000 miles of driving the oil was still very clean.
Thats saying alot for a 7.3L to have clean oil!!
However, it will not keep FUEL out of the oil. So just because you have clean oil doesn't mean you have good oil. You need to use OIL sampling if you plan on running one.