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Oil
So, the manual states the preferred oil is 0-W30(even tho there has been debate on which oil to use...strange). I know it's is common knowledge BMW uses Castrol products for oil. However I am a Mobil 1 guy. I was looking on their website and they have a racing oil in 0-w30 grade. All of the attributes and advantages listed for the oil are what I would consider optimum for the M (higher heat durability, extreme wear protection, extreme cleaning agents etc.). However it said not recommended for street use. I am no oil expert, but if it is the correct grade/viscosity, what would the oil do on the street that it won't do on the track or vise versa. All of the features sound exactly what a high performance engine would require/benefit from. Anyway, you oil experts please explain.
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