Diagnose the Problem

• Start by checking the engine for any visible leaks. Inspect the gaskets, oil pan, and seals for any signs of oil escaping the engine. Often, leaks can be a major cause of excessive oil consumption.
• Perform a compression test to check the health of the engine. If compression is low, it might indicate worn piston rings, which can lead to excessive oil consumption.
• Check for blue smoke from the exhaust, which is a common indicator of oil burning within the engine.
• Use an OBD-II scanner to check for any error codes that might indicate issues contributing to oil consumption, such as a faulty PCV valve.

Repair and Maintenance Actions

• If an oil leak is detected, replace the necessary gaskets or seals. The valve cover gasket and oil pan gasket are common culprits and should be thoroughly inspected and replaced if needed.
• In the event of worn piston rings or cylinder walls, a more in-depth engine rebuild may be necessary to restore proper function and reduce oil consumption.
• Replace the PCV (Positive Crankcase Ventilation) valve. A clogged or malfunctioning PCV valve can lead to excess pressure and oil being pushed into the intake manifold and consequently burned.
• Ensure that you are using the correct viscosity of oil for your engine. The manufacturer's recommendation should be followed to ensure proper lubrication and function.

Preventive Measures

• Regularly change the oil and oil filter according to the vehicle's maintenance schedule to prevent sludge build-up, which can exacerbate oil consumption issues.
• Monitor and maintain proper engine temperature. Overheating can lead to increased oil consumption and damage engine components.
• Regularly inspect the oil level and quality. Keeping a journal or log of oil consumption can help identify patterns or sudden increases in usage.
• Use high-quality oil and occasionally consider oil additives designed to reduce consumption, although these should be used with caution and not as a replacement for proper mechanical repairs.

Consider Professional Assistance

• If initial diagnosis and maintenance steps do not resolve the issue, it might be necessary to consult with a professional mechanic. They can perform detailed diagnostics that are beyond the scope of a DIY approach.
• For significant mechanical repairs, such as reboring cylinders or replacing piston rings, professional intervention is recommended to ensure the job is completed correctly and safely.