Last fall I poured in 9 quarts of Redline 5w-30 street
oil. At the same time I sent a sample of the virgin
oil to Blackstone for analysis. A few weeks ago I again changed my
oil and I sent a sample of the used oil (1,500 miles) to Blackstone for analysis. I use no additives in my fuel or oil, engine has about 14,500 easy miles on it.
I also included a Mobil1 test (used oil) from last year.
Here are the numbers - before/after/used Mobil1
zinc 1199/1283/790
phosphorus 1079/1060/656
molybdenum 705/689/81
lead 0/37/17
Any thoughts?
Bob
www.blackstone-labs.com