extremely high oil consumption???

Hello I recently added a MX-5 and had to find out that I had to refill almost 2.5 liters of oil after just under 500 km. The vehicle ran 110,000 km. it is a 1.6er with 110 ps. it got about 3 months ago an exchange engine which according to papers should have run 72,000 but which is 2 years not running … so in normal operation he ncihts only when I drive the car briefly and then start…. or if I get in the stand correctly gas…. has anyone ever had these problems? for answer I am grateful