That BP driver you talked to didn't know what he was talking about...
1. kero wouldn't have to be ULS to help
2. he wouldn't know the difference if it was winter mix, the driver doesn't have to do anything different
Look for a KwikFill or a CountryFair with diesel in your area, some will have ULSD, some will have ULSD in what they call All Weather Supreme. All diesel at all KwikFill or CountryFair stations is a winter blend as of Nov. 1, whether it's ULSD or ULSD-AWS.
My reasoning for using KwikFill and Country Fair is that they are both owned by United Refining Co. in Warren, PA. URC is completely American-owned, and uses 100% North American oil. No other refining company in the world can say that!