What type of oil is best for a 2010 cummins 6.7?

For a 2010 Cummins 6.7L diesel engine, the recommended oil is a high-quality synthetic diesel engine oil, typically with a viscosity of 15W-40 or 5W-40. Look for oils that meet or exceed API CK-4 or CJ-4 specifications to ensure optimal performance and protection. It's also advisable to choose oils that have the appropriate diesel certifications and are designed for heavy-duty applications. Always refer to the owner's manual for specific recommendations.