That lubricant is API SN compliant RP 5W-40 from the levels of Zinc and Phosphorous. TBN is a bit lower than expected for only 1500 miles. Wear metals ppm is ok.
The lubricant sheared to a heavy 30 grade in 1500 miles. That's the part that gets me about RP's never formulations. True synthetics don't shear like that.
Click and read here
The lubricant sheared to a heavy 30 grade in 1500 miles. That's the part that gets me about RP's never formulations. True synthetics don't shear like that.
Click and read here