Cetane Number
WARNING: This page does not describe the selected car, but rather 9 other vehicles, including the 2019 Ford Transit-350 HD, 2019 Ford Transit-350, 2019 Ford Transit-250, 2019 Ford Transit-150, and 2019 Ford F-550 Super Duty. However, it is still accessible from the selected car via links, so may be relevant.
The cetane number relates to the auto ignition quality of diesel fuel. The rating applies to diesel fuel similar to octane rating for gasoline. A measure of how readily diesel fuel starts to burn (auto ignites) at a high compression temperature. Diesel fuel with a high cetane number auto ignites shortly after injection into the combustion chamber and has a short ignition delay time. Diesel fuel with a low cetane number resists auto-ignition and has a longer ignition delay time. A minimum cetane of 40 is required for a optimal driveability and performance.