Originally Posted By: mongo161
Quaker State Oil Filters are Purolator Classic filters.
Not exactly. Quaker State, Pennzoil, Performax and Valvoline oil filters, while made by Purolator, are not the exact same filter as their Purolator branded bothers. These filters are meant for oil change shops, who do not want to carry more part numbers than necessary, so some of the filters are shorter to fit other applications as well. The Purolator L24011 that goes on my friends 99 Suburban is about 3/4" longer than its counterpart from the above brands.