Welcome, most here might not understand your economy numbers, like 2.9L/100k to penrith, but i used to do a trip right out western NSW just about every second week at one time. & the return trip to Sydney was mostly all down hill from Katoomba to Penrith, so not really a true indication of economy. like i would see unbelievable numbers on the stetch but would see believable numbers going from Penrith to Katoomba or say up Victoria pass

. but your getting great economy from the auto just the same.
I filled up in sydney two weeks back & have covered 1,120k on my 2011 FD 6 speed will fill up today. but i hardly ever turn off the trip computer economy & it mostly just sits on 5L/100K all the time unless i turn it off then you see it go up the settle down. but they definitely get great economy if you want them too.