6.7L Cummins Engine Testing – Engine Run-in (Without Dynamometer) – Test

On-Highway Applications
Operate the engine at 1500 to 1800 rpm in high gear for the first 80 to 160 km [50 to 99 mi] after rebuild.

NOTE: Do not idle the engine for more than 5 minutes at any one time during the first 160 km [99 mi] of operation.