What Causes the EA390 Engine to Burn Engine Oil?

[VonSebastian]

The EA390 engine burning engine oil is caused by worn or aged valve stem seals and excessive piston clearance. Below is relevant information about engine oil burning: 1. Symptoms of engine oil burning: Blue smoke from the exhaust pipe when starting the engine or during normal operation, while no pulsing blue smoke is observed at the engine oil filler port, or blue smoke from the exhaust pipe accompanied by pulsing blue smoke from the oil filler port. 2. Solutions for engine oil burning: Cold engine oil burning: When the car's temperature has not fully warmed up, the engine exhaust emits significant blue smoke, but returns to normal after warming up. This phenomenon is caused by aging valve stem seals. Replacing the valve stem seals can resolve the issue. If the engine burns oil when hot and the condition is not severe (for safety, a cylinder pressure test can be performed first), the oil pan can be removed directly, the pistons taken out, and the piston rings replaced.