Florida pump today says a minimum of 40 cetane fuel (BP Station) $2.69.9. Whats with the cetane rating? Florida fuel is high compared to CO, NM, TX, LA, MS, AR. NM/TX the lowest at $2.28.9.

Generally, diesel engines run well with a CN from 40 to 55. Fuels with higher cetane number which have shorter ignition delays provide more time for the fuel combustion process to be completed. Hence, higher speed diesels operate more effectively with higher cetane number fuels but provides no further performance past 55 due to thats where it peaks

And Texas up and down with diesel some are 269 others are 239 from what ive seen here in san antonio.