Attached is the oil analysis I got after 13k miles of the Turbonetics kit installed on my car. I have been using Turbonetics TS-1 oil for the last 3 changes and so far it appears to be great. I don't burn any, the engine runs smooth, no valvetrain noise, and according to the analysis even after 3,000 miles the additives in the oil were in GREAT shape. Their site says typical TBN levels (additive amount and how well they are still working) for a gas motor oil is 8 or 9. According to the report the TS-1 was still at an 11 after 3,000 miles. I guess theres a reason why Turbonetics says its one of the reasons they can offer a 12k mile warranty on all their turbos. According to Brad from Turbonetics when they performed testing on bearing longevity they found that if TS-1 was used to lubricate the bearings even once every 12k miles they found that in 99.9999% of the cases there was no bearing wear. I'm also attaching their product data sheet on their oil.