The reason for blending PME (and SME) with RME is that PME and SME have a higher Cold Filter Plugging Point (CFPP) than RME and are not therefore suitable for use in their pure form during winter months in cold regions of the European Union.
Begrundelsen for at blande PME (og SME) med RME er, at PME og SME har et højere koldfilterpunkt end RME og derfor ikke egner sig til anvendelse i den rene form i vintermånederne i de kolde egne af Den Europæiske Union.