I just did a Mobil 1 oil change on my 93 yesterday. The last time I changed it was 6-12-09 with 41021 miles. Yesterday when I changed it my miles were 41027. A whopping 6 miles. Can I keep the Mobil 1 in there for longer or should I change it out every year? Its definately not a money issue or time issue. It goes in as clean as it comes out
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