John,
this board is littered with threads on the same, just enter Gasoline in the search box and read away.
CRRA #10 has Train Orders regarding the transit of CONX 8 on the Clear Creek lines. Harry Brunk wrote about the CONX 8 traffic in the Gazettes, you can also find this in the Blog
http://coloradosouthern.blogspot.com/2015/09/harry-brunks-30-year-old-mystery_11.html
UpSideDownC
in New Zealand