A call to Cummins Care , with you engine serial number will provide the correct , oil fill amount .
If you don't have the engine serial number , and can't get close enough to get it off the engine tag. then a call to Freightliner free help line with your chassis serial number will provide that as well as trans and differential numbers too.
99% chance dipstick calibration is wrong , I had to calibrate Dodge/Cummins dipsticks all the time.
Cummins Care
1-800-343-7357 ( 1-800-DIESELS )
Freightliner Help
1-800-385-4357 ( 1-800-FTL-HELP )