ive been a mazda tech for 16 years and all faults everyone is saying are old ones
engine flooding pcm reprogramme and modified starter motor

fuel consumption you get around 25mpg


engine oil you use around 1 litre per 1000 miles


there like all cars if there have been looked after they will look after you

you wouldnt kick the shit out of your cosworths from cold would you .

best advice i can give you is get the best one you can afford .ive seen ones with over 120,000 miles on the clock and are as sweet as a nut .but i have also seen ones with 40,000 miles needing a rebuild
always get a compresion check done as part of the deal