I have altis 2006, reducing oil driven 126,000km.. I overhauled its engine form Toyota Peshawar, costing 70,000rs. New piston rings, clutch plate bla bla... However it still reduces oil around 1 litre per 2500Km... I use liqy moly 10w 40....I have driven 20,000km after over hual and same fault... No smoke, car is fine but just oil reduces.. it reduces a lot when I drive on motorway...from where can I do compression test in Islamabad? and how much does it cost..Thanks