What kind of motor oil on Mitsubishi 4d56?

For the Mitsubishi 4D56 engine, a high-quality multi-grade motor oil with a viscosity rating of 15W-40 is typically recommended, particularly for diesel engines. Look for oils that meet API specifications like CI-4 or higher for optimal performance. It's also essential to check the owner's manual for any specific brand or oil recommendations related to your model year and driving conditions. Regular oil changes are crucial for maintaining engine health.