I was curious to see how the Trop Artic 5w-30 semi-synthetic was holding up and to get a baseline for this engine. Report below:
1255001_jim-arnold-akron-oh_2007-prius-1-5l-4-cyc-dohc_07110753.pdf

Download the PDF above or click the image below for a JPG version of the PDF. The PDF will have attached notes you can read.