Freedom is not free
Join Date: Sep 2007
Location: Sioux Falls, South Dakota
Re: How much cetane booster to add?
Diesel engines run well with a cetane index from 40 to 55. Diesel fuels with a higher cetane index 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. There is no performance or emission advantage when the cetane is raised past approximately 55. After this point, the fuel's performance hits a plateau. In the US diesel at the pump can be found in two cetane ranges: 38-42 for regular diesel, and 42-45 for premium. Premium diesel also may have additives to improve cetane and lubricity, detergents to clean the fuel injectors and minimize carbon deposits, water dispersants, and other additives depending on geographical and seasonal needs.
So yes, a cetane boost is a good thing but a diesel fuel additive with all the above mentioned additives is the best route to go IMO
. I like using Schaeffer's Dieseltreat myself. At @ $6 a can it treats 125 gallons and adds a 5 point cetane boost.
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