Hi, urgently need your help, I recently bought a Jeep Grand Cherokee 3.0 diesel. The car was brought from America, mileage was about 141 miles, the first time the computer started to warn about replacing the engine oil at 2,000 km, the second time at 3000 miles, and now I have traveled 500 km, and the computer again shows that already has 80 percent to oil change, and it will do again about 3,000 km. But it's not normal to change the oil every 3000 miles, please help, what should I do?
And one problem when I first got into the car, it was all in miles, I changed the mile per km, and since then, and led, recently decided to again change per mile, but it was not there, replaced only a speedometer and the total mileage cars remained in the mileage as you think what is the reason and what can I do?
P.S. drove the car in service, diagnostics revealed no problems.