2004 partner oil reduction

I changed the oil of the 2004 model patner vehicle, which I bought as a second hand, I went around 2000 kilometers, and when I checked the oil, I witnessed the oil decrease. Is this normal?

Depending on how much it decreases, how far the rod has gone down has to look at it

only the oil lamp did not illuminate until the end of the bar

Which oil do you recommend? thanks for your answers already

It is necessary to show that seriously reduced oil additive does not benefit, it may be missing from somewhere or it may be burning fat? Are there any problems with the traction?

How many kilometers is the vehicle?