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    RLI 5W-40 vs. M1 0W-40 for Track/Street C6Z06

    Hey guys, I have a 2006 Z06 and am trying to decide between RLI 5W-40 and Mobile 1 0W-40 (European blend). This is not a daily driver; I do a fair amount of track days as well as weekend driving, so need an oil that can best hold up at 250+ oil temps and cover the whole spectrum. I currently use...
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