Factory oil filters vs. After Market oil filters - Car Forums
I also use Mobil 1 oil and change on an anual basis. After 6 months I change oil filters. I read articles that Mobil tested 4 identical vehicles for 200, 000 miles each. They changed oil in 2 of them at 7500 miles and the other two at 15 000 miles. After 200,000 miles all four engines had all wear parts up to specifications for **new** parts.