I have a 2 ltr Petrol QQ Acenta with over 70k miles, is there a particular oil I should be using at it has higher mileage, or should I just keep to Mobil 1 5-30. ?
Nope, if there are no issues then carry on using the same oil as you have been doing. No need to change, and to be honest, 70k is not really high mileage any more!