Maiden voyage with the bike on the Harbor Freight trailer - about 850 lbs total. 366 km (227 mi) to Osoyoos.
Lots of giant hills and the Matrix did just fine. Not surprising, as I have pulled a 1400 lb tent trailer with it before.
9.3 L/100 km (25.3 mpg). I will edit this post once I have return trip data.
EDIT. The return trip was 8.8 L/100 km (26.7 mpg) according to the SG2. Must be the elevation change. Average was 9.1 L/100 (26.0 mpg). I am happy with that.