Talk:Equivalent carbon content

This equivalent carbon content equation is different to that of Shell's standards (DEP). In the DEP it does not include si whereas here it is included, please explain why?

Empirical, heurestical or theoretical?
Are the equations for the calculation of equivalent carbon content empirically derived or elsewise? Mawkish1983 (talk) 13:11, 11 August 2009 (UTC)
 * Yes, empirically derived. Bernoullies (talk) 13:17, 13 November 2011 (UTC)