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  1. J

    Will syntectic lower oil pressure compared to dino

    I need to get my oil pressure down. I was running Rotella 15/40 and then switched to Valvoline VR1 straight 30. The straight 30 did lower it some, but would like to lower it more. My engine builder said do not use 10/30 as it is to light but straight 30 is fine Question is, would the oil...
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