This is the latest oil analysis with Brad Penn. I actually used 3.5 qt 10W-40 and 1 qt of 20W-50. The car has 2.2L. I did 2 auto cross events and about 6 hours street tuning during this interval. The rest is mainly normal driving and one trip SF-LA. It was on E85 for approximately 500 miles and the rest was on 91. Any comments appreciate it. Thank you.
