In my time around different shops I've always paid attention to what the little repair shops around here use for filters and oil. In our area the predominant parts chain is Auto Value and many of the shops around here use theif filters (Purolator rebadged) and oil (Ashland made) for their customer changes. Another shop I know of use Advance's oil and filters.
I just wondered what others have observed in their local area?
I just wondered what others have observed in their local area?