Q: Oil consumption is very high ,after oil service if we drive for 500 km indicates oil level low top up 2011 Audi A4 Turbo

Hello - oil consumption is, for some reason, higher on this specific engine than on other 4 cylinder engines, turbocharged or not. Typical oil consumption is approximately 1 quart per 1500 miles. If you have blue exhaust smoke on an on-going basis, the turbocharger seals may have failed and will require a rebuild of the turbocharger. The low oil level warning is for your protection to avoid engine damage. Make sure that the oil level is correct after an oil change service - check it before leaving the facility. It has happened that not enough oil was put in the engine. If these checks are not satisfactory, I would recommend an engine inspection by a mobile, professional mechanic, such as one from YourMechanic, who will come to your location, diagnose this problem, give you an accurate assessment of damage and cost estimate for repairs.