The following detailed information on Ultraguard is direct from Alliant Power website Higher cetane fuels have shorter ignition delay periods and will combust more efficiently than lower cetane fuels.
Alliant Power ULTRAGUARD Diesel Fuel Treatment – 12 Pack of Pints | AP0501
Alliant Power ULTRAGUARD Diesel Fuel Treatment - 12 Pack of Pints # AP0501
Alliant Power ULTRAGUARD Diesel Fuel Treatment - 6 Pk of 32oz Jugs # AP0502
Alliant Power ULTRAGUARD Diesel Fuel Treatment - 8 Pack of Pints # AP0501
Alliant Power ULTRAGUARD Diesel Fuel Treatment - 12 Pack of 8oz # AP0500
Alliant Power ULTRAGUARD Diesel Fuel Treatment 12 Pk of 32 oz Jugs # AP0502