Cetane Number
The cetane number measures diesel fuel's ignition quality — how quickly it ignites after injection. Higher cetane means faster, cleaner ignition with less knock, smoke, and noise. Standard ULSD has a ...
Grant Taylor
Fleet Solutions Director, Fuel Ox
What Is Cetane Number?
The cetane number measures diesel fuel's ignition quality — how quickly it ignites after injection. Higher cetane means faster, cleaner ignition with less knock, smoke, and noise. Standard ULSD has a cetane number of 40-45. Premium diesel and cetane-boosting additives like Fuel Ox can raise it to 50+, improving cold starts, reducing emissions, and delivering smoother combustion.
Related Fuel Chemistry Terms
More Diesel Glossary Terms
Ready to Cut Fleet Fuel Costs?
Get a custom fleet pricing quote in 24 hours. Tell us your fleet size and fuel spend — we'll show you the ROI.
Contact Us
Have a question or want to work together? We'd love to hear from you. Fill out the form and we'll get back to you as soon as possible.