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Select your choice of CI-4+ rated oil in 15w40 weight is probably your best bet if the temps will be above 30 degrees F. You should not use a full synthetic until 10k miles. Good luck
X-Hibition, Many folks (including some oil manufacturers) recommend diesels be operated to 10K with conventional oil for a variety of break-in related reasons...
Click this thread for more discussion-->https://www.ford-trucks.com/forums/2...ight=breaking+