Originally Posted by mrstas63
I would like feedback +/- On this OC. PL30001 yellow filter, Rotella T5 10W-30 oil, Stp oil treatment. 4.0 has 90,000 on the clock.
For good all weather, I'd suggest a 5W-50 Synth or Synth Blend. With well over 150K on a '95 4.0 never had problems with oil mileage and never used any of the "high mileage" oils, just synth/blend.
STP isn't really required, but I used it as well. Also sea foamed about once a year.