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Will Clogging Occur with a High Mileage Oil?
Will Mobil 1 High Mileage oil clog any orifice in the engine due to the seal-swelling additives?
-- Alvin L Williams, Evanston, IL
Throughout the comprehensive testing and design of Mobil 1™ High Mileage motor oil, we have not experienced any instances of clogging in the engine due to the higher level of seal-swell agents.