Hi there,
I have a 04 350Z GT original Irish car completely stock in silver with 50K miles and its a daily driver doing 300 miles a week and it stays around 26mpg with lots of blasts of speed.Absolutely love it and have the car a year with very little only a service and a set of tyres with regard to costs.Its a rare enough car on the roads here due to the road tax being €1800 a year so gets a lot of attention. The only thing i have done was install a 7 inch android tablet in the cubby and did the aux in mod to the bose stereo to have sat nav, music, video etc.If you have the money go for it.
Barry