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    2009 Subaru Impreza recommendation (2.5NA)

    In February 2014 I had a leaking head gasket repaired (at 62k miles) and it alerted me to the fact that the engine is consuming oil, so I've been monitoring it fairly closely since then. I've always used M1 5W-30. Post head gasket repair I've tried three different oils: M1 5W-30, 1350 miles/qt...
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    2015 Audi A3 2.0 Quattro recommendation

    I'm new to the forum, and while I've done all our oil changes for quite some time, I now realize I have much to learn about engine oil. I have a few questions for the experts, but first a little more info. My wife is the primary driver. She likes to drive fast (road conditions permitting), but I...
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