Not sure what 'running fantastic' is. The dude has a Toyota **** box that can run on the engine oil it came with and be fantastic. I don't really like Mobil-1, it's a butt dyno but I always feel that my car likes Castrol Edge better.
I read that Mobil-1 US is not as quality as it used to be in order to price it self lower for the competition/cut costs. Changing oil at 15K makes me feel wierd.
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