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Here are the test results of four levels of motor oil from one brand to see if there really is a difference in the higher mileage formulation that makes paying $4 more per quart a smart investment for your car’s engine.
Does buying the most expensive oil within a single brand guarantee your engine will benefit the most with this choice? Here’s a recent Pennzoil motor oil comparison test that reveals some surprising results that will make you rethink your motor oil buying decisions---especially if you own a turbo or direct fuel injected engine.