SOPUS advertised the 5W30 as 10% loss when it was new and the PQIA got it at about 9%.
Need new numbers for the dexos1 Gen 2 versions, though, a lot has changed.
2014 Forester XT, 80500 miles
Valvoline Full Synthetic 5W30 d1G2
Tokyo Roki 15208AA170 filter