I just bought one in June.
SSV Wagon Series 2 Manual.
I do combo of highway and City driving. Fuel is about 14.5 to 15.5 per litre on 95 and about 15-16 per litre on E85 (which is 20 cents per litre cheaper than ULP)
Its stock at the moment besides an exhaust, but Im getting a Mafless tune and OTR soon so it should drop to around 12-13L/100 after its tuned.
By the way, when it went in for service I had a SV6 ute as a loaner. What a piece of crap compared to the SSV. Couldnt wait to get out of it.
Btw. I get more people stopping me and commenting on my rims than when my HSV was new. The old school just loooove the dish!