Here is my latest oil analysis from Blackstone Labs on my recent run of QSUD 5W30.This run saw lots of stop/go traffic in Metro East St Louis area, frequent idling and 2-3 mile runs between stops. I used a Mann filter with this run and put back more QSUD 5W30 and another Mann filter. I got the oil for $2.99 after rebate so I stocked up on it. I was very pleased with this report, and think I will push out the OCI to 10K miles next time. Any thoughts or comments are appreciated.