AMSOIL is standing behind there product! They are so sure of there products that they are going out on a Limb with our oil sludging 1.8T and offering a 25,000 mile oil change interval. YES 25,000 MILES. If you use the recommended Oil Filter and recommended AMSOIL oil, then they will gaurentee your engine. Read below to find specific information about the 25,000 mile oil intervals. Absolute Efficiency AMSOIL Ea Oil Filters have the best efficiency rating in the industry. EaO Filters provide a filtering efficiency in accordance with industry standard ISO 4548-12 of 98.7 percent at 15 microns, while competitive filters containing conventional cellulose medias range from 40 to 80 percent efficiency. Less Restriction AMSOIL Ea Oil Filters have significantly lower restriction than conventional cellulose media filters. Their small synthetic nanofibers trap smaller particles and hold more contaminants, resulting in lower restriction. During cold temperature warm-up periods, an EaO lube filter allows the oil to easily flow through the filter compared to a typical cellulose filter. Lower restriction decreases engine wear. More Capacity A filter’s capacity refers to the amount of contaminants it can hold and still remain effective. AMSOIL EaO Filters have a far greater capacity than competing filter lines. When used in conjunction with AMSOIL synthetic motor oils in normal service, EaO Filters are guaranteed to remain effective for 25,000 miles or one year, whichever comes first. Superior Construction AMSOIL Ea Oil Filters are made with premium-grade full synthetic media. The strictly controlled processing of this media ensures accurate filter construction, and is what allows Ea Oil Filters to deliver higher capacity and efficiency along with better durability. Over the service life of a conventional cellulose filter, hot oil will degrade the resins that bind the media. The Ea Oil Filters’ full synthetic media technology is resin-free. It uses a wire screen backing that is pleated with the media for superior strength. Ea Oil Filters are constructed with HNBR nitrile gaskets that are fully tested to extreme distances in numerous severe environments. The filters also feature fully tucked seams, a molded element seal, roll-formed threads and a long-lasting premium-grade silicone anti-drain valve. Applications AMSOIL Ea Oil Filters provide superior oil filtration for vehicles in the auto/light truck market. Service Life AMSOIL Ea Oil Filters are guaranteed for 25,000 miles or one year, whichever comes first, when used in conjunction with AMSOIL Synthetic Motor Oil. AMSOIL recommends changing the oil filter at the time of oil change. If used in conjunction with AMSOIL Motor Oil that is being changed at intervals less than 25,000 miles, the EaO Filter should be changed at the same time. AMSOIL EaO Filters are not guaranteed for 25,000 miles when used with any oil other than AMSOIL Motor Oil and should be changed according to vehicle OEM recommendations.