ya the only thing i dun so like on my ride is the road noise. u may choose some quiet tyre to reduce it but you will still hear it. mazda 3 sound proof is a bit weak compare with other car like altis. other thn that, i kinda love it. so what i suggest to you is, turn the music volume high and change to the quiet tyre like what i did. i am using Yokohama Advan DB. nt bad.

for the FC, i think after first service might improve because for myself, i have drive my car for 1 year plus. my FC around RM75 per tank, RON 95 - 450km. is kinda acceptable for 2.0cc car

Enjoy your ride !!