Originally Posted By: bugeye
2006 Lincoln LS, 74640 miles
out Pennzoil Plat, 5W-30, 4180 miles, NAPA Gold #7302 filter
in Quaker State Ult Dur, 5W-30, Purolator Pure One # PL15317
Drain oil somewhat translucent, but glitter in sun?
6 quarts mid range on stick
IMO....you are under-utilizing PP at only 4180 miles. That oil should go at least 7500 mile and even more.
QSUD is another excellent syn which I'm using now, and should be able to do 7500 easy.
Also, you might consider using a top-shelf filter like a Fram Ultra (2x7500) or Fram Tough Guard, to get top-notch filtration.