Below is a copy of my Blackstone report for the last six years on the Boxster. I switched to DT40 in of January 2014 after 13 years of using Mobil One so the last two results are based on DT40 usage. However, I did not flush prior to the first fill.
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1995 Porsche C4 Cab
2016 BMW M2, 6 Speed LBB - ED 7/2016
1997 993 Cab - Sold; 1997 993 Turbo - Sold
2001 Boxster S - Original Owner - 30K Miles -SOLD