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Mobil 1
All I know is if you track your car I would use VR1 or another quality racing oil. On every car I used on the track I noticed oil pressure drop off after a session with Mobil 1 oil. After switching my oil and taking my car back to the same track my oil pressure stayed more consistent and was highter overall. (the same weight oil was used for both brands) It almost seemed like Mobil 1 was breaking down with the rigors of racing. Maybe because it has less ZDDP then the racing oils? Either way I don't like to play games with oil pressure so no more Mobil 1 for me....
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