Luber-Finer offers the Imperial XL Oil Filter. According to the company, these filters have 1.5 times the filtering capacity of the leading brands of cellulose filters. This higher efficiency means that less contaminants are allowed to pass through the filter media, resulting in longer life for sensitive components. Imperial XL oil filters protect engine parts by providing less oil restriction during cold engine starts. The key to the Imperial XL’s performance is its LH 60 Synthetic Media, which delivers up to 90 percent efficiency thanks to its enhanced particle removal and ability to handle higher operating temperatures.