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Originally Posted by RunningTooHot
What’s up with the discrepancy between “east of the rockies” and “west of the rockies” formulation? For the west coast, their datasheets show a “typical cetane index” of 52.5, and a “typical cetane number” of 54. However, the datasheets for the “east of the rockies” product lists a “cetane number minimum” of 45. Big difference - I guess that I should be glad that I’m on the left coast.
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The EPA requires a minimum cetane number of 40, but in California the CARB requires a minimum of 48, so the "east of the rockies" stuff (which is probably cheaper to produce) wouldn't cut it. Why 54 cetane, I dunno, but I'm not about to question BP's decision
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