Napa Pro Select vs Silver vs Gold ... do they all use the combo bypass/anti-drainback valve?
Is the Pro Select sufficient for 6 month/1500 mile OCIs, using conventional oil, in dusty conditions?
I'm looking specifically at the SFI 21356 vs SFL 31356 vs FIL 1356
Is the Pro Select sufficient for 6 month/1500 mile OCIs, using conventional oil, in dusty conditions?
I'm looking specifically at the SFI 21356 vs SFL 31356 vs FIL 1356