lol marc's onto something there...
I had a na 33 gts4 manual for a daily, got around 10-11l/100km but got sick of the noise and harsh ride (that said, my 32 is absolutely rock solid)
Sold it and bought my au falcon for 2500 (158km), spent a grand and a half on it making it pretty / new brake pads / exhaust etc and its running brilliant. Gets me 12l/100km around town without needing a light right foot.
Loads faster than the na33 too.