Cetane ratings in Colorado (or mid-west to west coast in general)

Stuart Little

Veteran Member
May 6, 2011
Denver, CO, USA
10' Jetta TDi Cup Edition - 6M, 02' TDI Beetle - 5M
I'm looking to find out what companies claim to offer cetane wise here in Colorado but a general region rundown would probably help me as well if someone has the numbers lying around.

Around me in general I have, Shell, Valero (aka Diamond Shamrock), Conoco, and a few others here and there but those are the main three.