19. Champ XLChampion Laboratories has its finger in many oil filter brands, some of which you will read about later in this article. The company also produces its own line of filters, including the XL Synthetic Oil Filters, also known as the Champ XL filters.Not to be confused with Champion Laboratories' standard Champ filters, the XL filters are primarily designed for synthetic oils and use a synthetic blend filtration media. These components have a self-proclaimed 98.7 to 99% efficiency for debris of 20 microns or larger. Moreover, Champ XL filters are supposed to last around 15,000 miles.Pricewise, Champ XL filters vary depending on the model. If you purchase one, you will probably be looking at anywhere between $6.69 to $19.99. Moreover, different models are designed for specific cars. Regardless of compatibility limitations, all Champ XL filters utilize a durable steel construction for the shell, center tube, end caps, and baseplate. According to users, Champ XL aren't the best oil filters around, but they are well-priced for their performance. If you have to choose between standard Champ oil filters and Champ XL filters, go with the XL.13. AMSOILAMSOIL oil filters are manufactured in the U.S. by Champion Laboratories, a white-label manufacturer that also produces a couple of oil filter brands of its own (Champ and Luber-finer). The company is known for producing great motor oil and expensive, high-quality filters. We must also acknowledge the small matter of the company's reputation as something like a multi-level marketing organization. AMSOIL is a direct sales company that was a pioneer in the synthetic oil market. Its sales representatives tend to have the unrestrained positivity of true believers, which has led some to jokingly suggest that AMSOIL is a cult. As the market for synthetics has expanded in the past two decades, competitors have largely erased AMSOIL's uniqueness, which has in turn reduced the silly comparison to nil.AMSOIL filters offer 99% efficiency at 20 microns and are rated to last 15,000 miles (EA15K models) to 25,000 miles (EAO filters). And, in fact, AMSOIL claims that its filters are superior in every category: better efficiency, higher flow, greater capacity, and better product construction. 7. NAPANAPA's oil filters are divided into several categories with names such as Silver, Gold, Platinum, and Proselect." As one might expect, these categories boast differing degrees of performance and efficiency, and they are made of different materials. However, specific filters are also designed for different purposes.Proselect, Silver, and Gold filters utilize a cellulose filtering media –- while an enhanced cellulose media for Gold filters. Proselect and Silver are best paired with vehicles that are used for errands and run on conventional oil. These filters last around 4,000 miles. The Gold filters, meanwhile, are designed for the average commuter and excel with synthetic and synthetic blend oils. These filters last much longer -– around 7,500 miles -– and have a 96% filtering efficiency for contaminants of 20 microns or bigger and 99% efficiency at 30 microns.Napa's final line of filters, the Platinum, are designed for towing vehicles and cars that either venture up mountains or through extreme weather conditions. Unlike the prior lines, Platinum filters use a synthetic filter media. While they last as long as Gold filters, Platinum filters have double the capacity. However, this upgrade comes at the cost of filter efficiency, as Platinum filters have a 99% efficiency rating with contaminants of 35 microns or larger.3. DonaldsonDonaldson Filtration Solutions, alternatively known as Donaldson Company Inc., specializes in filtration devices for industries such as private, aerospace, and military. More importantly, Donaldson holds several awards and patents related to its filters.Donaldson's filters fall into three labels: Standard, Blue, and Competitive Fit. While each brand is designed for heavy-duty diesel engines, they are all reportedly high quality. Moreover, many filters are compatible with the proprietary Donaldson Filter Minder Connect system. These devices can monitor the filters of entire vehicle fleets and alert users when a filter needs maintenance, either in an emergency or prophylactically.Each Donaldson filter is built differently, as each is designed for a different vehicle. Standard Donaldson filters are intended for regular heavy-duty diesel engines and use silicone-base treated cellulose filter media. These filters have a 99% efficiency for debris anywhere between three and 36 microns. Meanwhile, Donaldson's Blue line is built for heavy-duty trucks and uses a patented Synteq filtering (a combination of cellulose and melt-blown synthetic media) to remove 90% of contaminants as small as 10 microns. Finally, Competitive Fit filters are designed specifically for Cummins ISX and X15 engines and have 98% efficiency with debris 15 microns or bigger.