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Again why would anyone use an oil filter for more than the manufacturers warranty. P-1 is only warranted for 3000 miles. Lets spend the money for a high mileage filter. Each company spends considerable amount of time and money performing R&D on the filters. If the P-1 could last 10,000 miles it...

I have to change oil soon on my GMC 3500 and want to have the best product for this vehicle. It has been changed at 4000 mile intervals for the last 7 years with Mobil semi-synthetic. The company is now requiring us to change our oil at 6000 miles. I decide after the dealership changed oil...

I new to the oil talk world so my ignorance may show a little. I have been doing my own oil changes for 42 years on various vehicles. I have a company service van that is required to be serviced through a vendor. The vehicle is a GMC 3500 with 167,000 miles. The dealer switched oil from semi to...