branded or ordinary petrol????

I do not think so that this makes any difference but i use mainly Shell or Caltex in my vehicle and i think both are of good quality and never had any problem with them yeah sometime the quantity is issue some of petrol pump do this in order to earn some extra cash they will charge you more and not give you the correct amount of oil.

Thankfully, my car is still doing just fine and no problems with it at all. I just got it 3 years ago and it was in a good shape.

not of much....as far as mileage is concerned but a decrease in maintainance....