@Xulfiqar bhai,
Our 1.3 GLi has odometer near 150K.I saw few days ago and observed sludge in engine oil but quantity was full in dipstick.
Now its time to get oil change, I saw LiquiMoly Engine flush which was I think around 600 mL. That flush oil has to put in old oil and run for 20 minutes, then draining is required.
My concern is as my car engine already has Full oil, if i will add flush oil in it, its quantity in engine will exceed maximum oil limit and excess oil is as harmful to engine as Low oil.
So should I drain out 600 mL of old oil and add flush oil to be in limits and clean engine well