Re: Different Brands of Diesel
is there a difference at all between where you buy your diesel (Shell, Sunoco, Citgo, Exxon/Mobile, ect.)
Yes. Refineries use different processes/methods to make diesel fuel. The end result is it must meet specifications.
So would a product with a higher cetane rating have a better combustion ratio as a lower cetane rating?
Cetane number is a measure of a fuel's ignition delay; the time period between the start of injection and start of combustion (ignition) of the fuel. Higher cetane fuels will have shorter ignition delay periods than lower cetane fuels.
Diesels engines run well with a cetane rating from 40 to 55. Fuels with higher cetane number have shorter ignition delays and provide more time for the fuel combustion process to be completed. Hence, higher speed diesels operate more effectively with higher cetane number fuels. There is no performance advantage when the cetane is raised past approximately 55. After that the fuel's performance hits a plateau. In the States, diesel at the pump can be found in two ranges: 38-42 for regular diesel, and 42-45 for premium. Premium diesel may have additives to improve cetane and lubricity, detergents to clean the fuel injectors and minimize deposits, water dispersants, and other additives depending on geographical & seasonal needs.
In addition, lower cetane diesel fuels can yield more difficult starts in cold weather and at higher altitudes.
In Europe, diesel cetane numbers are set at a minimum cetane index of 46.
Not trying to be a smart a$$, part of my job is oil analysis & fuel analysis.
2003 F250, Wildman tunes, Faubion trns, Swamps 175/146 SS,van turbo/WW, DI Intercooler, oilguard bypass, intank & pre-pump, reg return, Firestone air bags, Bilsteins, 350 HP/692 TQ
2000 Excursion- Pwrd by: T Wildman 6 pos chip, CT Performance Suspension, Riffraff Diesel Performance, J&M Tranny, 4" MBRP, 6637 filter, intank/prepump mods