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    tier one vs. tier two

    What is tier one and tier two fuel? May I assume tier one is the major suppliers and tier two is wallyworld-krogers, etc.?
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    Wrong Oil?

    Hi everyone. I'm a newby with a question. I really goofed today. A local auto parts store had a grand opening and offered a deal (buy 4 quarts Mobil 1 and get the 5th free). The counter person took me to the Mobil 1 and helped me carry the 5 quarts to the counter. The oil was HIGH MILEAGE! I...
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