Oil deficiency

My friends vehicle is 206 CC.motor 2.0 16 valve from 136 horsepower (gti engine) no lpg. Not installed at all. Km = 75.800 (seventy-five thousand). My vehicle went into maintenance at 73,000. The master petronas brand put 5-30 oil. My car checked the oil after 2,800 km.It reduced half a liter (0.5). There was no leak. The oil cooler was there. The old piece was torn. The oil filter is now clean, but the oil is half a liter at 2,800 km. Fat burning, throwing smoke, etc. There is nothing. I use calm all the way. I always take petrolophy. Some say normal. Some say a lot. Some say from the brand. Some say it burns fat. Maybe there are 2 aluminum pipes in the card. I don't know what those pipes are in the thickness of the umbrella. There is no 1 gram drop on the floor. Traction is super. There is no oil and smoke in the exhaust. I love my car. I do not want to sell on Uyor. The booklet also stops. The maximum oil is missing in the booklet says 0.5 km per 1000 km. The oil says it should be 5.40. It says 3,3 liters for 1,4 206. 1.4 engines put 3.3 liters and 4 liters. My 2.0 engine says 4,25 then I will not put 5 liters. It does not make sense. To me, there is a cartel like a donkey. mycatt 2019-09-21 19:11:53

teacher, you have traveled 2000-odd km

I think there should be 1000 km half a liter oil reduction. Also, the engine in the car is getting old or not, I think 5 30 is very thin. I think 5 30 is for more model vehicles but the oil thing is a little personal choice.