301 1.2vti engine sound

Why do vehicles with a 301 1.2 vti engine work like a diesel engine? what should be done to reduce or minimize this sound?

What was the engine oil used last time when my teacher was cold in the morning when it was warmed up with the norm?

It is normal for 3 cylinders to have more noise and vibration than 4 cylinders due to timing. But there is also a constant control of the oil level can reduce oil, they put 10-40 oil, which affects a lot. Use 5w30 or 0w30 oil.

I don't know exactly what engine oil was last put in last week I changed the ct, I left it to the master, he said, we changed the air filter, oil and oil filter, I know that he only put thin oil, I did not ask for a brand model.

let's pay attention to the oil after that :)

The vibrations complement each other when working 2 in 4 cylinders do not have much resonance, but when the 3 cylinders work in sequence, a little more resonance comes out. Unfortunately most of the 3 rollers are. V type motors are even quieter and vibration free compared to 4 leathers.
My aunt has an i10, 1.0 o and 3 cylinders when the oil change was wrong, the car that had put the service crankcase incorrectly trembled like the train was passing over it at idle. We went to the service 1 week later, they found the problem and fixed it.

I understand. I also had an oil change over the weekend, did they reverse the sump plate :))

Friends, I have 208 1.2 vti gasoline, but when I go out and listen while idling, the sound that feels like the car is diesel. Do you think this is normal or is there a mechanical error?