Infiniti

I am interested to buy a luxury car. i only can afford around $15000-$17000. my choices are infiniti g35 (2003) or cadillac cts (2003). i want to know more about them: things like the price of repair of parts and labour and how much gas each one takes or uses per 100/km. so basically which one is better and answer completely with some details so i know but i dont care about insurance while i care about how much fuel they burn per 100 km tanx

Far too many problems with caddy infinity will run for everi saw 8 caddys with blown motors last year when i was looking for a car these were all 99 and newer