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I am looking for a recommendation. My last 3 oil changes came back from Blackstone Labs with 30 ppm of copper in the oil. The car has 37k miles and has rear mount twin turbos, cam, Melling oil pump with very good oil pressure and 540 whp. The bottom end is stock. I run the car hard at times, the last couple years have done three 1/2 mile drag runs and several four 1/4 mile runs and occasional street pulls through 1st and 2nd. I use Mobil1 0W40 and add a bottle of ZDDP to the oil. I would appreciate any thoughts or suggestions as what I should do.
Are your turbos oil lubricated? If they are, what popped into my head is the material for your turbos' journal bearings (assuming journal bearing and not ball bearing).
I had mine checked a couple of years ago and had 71 ppm. Blackstone said a lot of LS-1's had higher copper levels due to the cam bearings and not to worry about it.
30 PPM copper
