Contaminants from combustion and other sources can lodge in tight engine passages, causing serious and costly damage to bearings, cylinders, and other moving parts. Since oil passes through your engine four times for every mile you drive, the same oil has passed through your engine 15, 000 times by the time you drive 3, 000 miles. You need a filter that keeps dirt out, and keeps your engine performing at its peak. The FRAM Double Guard oil filter does just that, and more. The Double Guard filter is the only oil filter to contain DuPont Teflon® PTFE the same Teflon®* PTFE as found in many of the leading oil additives. So not only does the Double Guard product filter out the harmful dirt that can corrode your engine, for those consumers who would like to use a Teflon® additive, the Double Guard filter provides a way to distribute it to your engine. * Teflon® is a registered trademark of E. I. DuPont de Nemours and Co.Pit Stop USA offers Fram Double Guard Oil Filter - SB Chevy (Long) PH5 at low everyday prices. Be sure to check out all of our products from Fram Filters including Fram Filters Fram High Performance Oil Filters.