▁standards ▁of ▁those ▁countries . ▁The ▁temperature ▁at ▁which ▁pure ▁( B 1 0 0 ) ▁b iod ies el ▁starts ▁to ▁gel ▁var ies ▁significantly ▁and ▁depends ▁upon ▁the ▁mix ▁of ▁est ers ▁and ▁therefore ▁the ▁feed stock ▁oil ▁used ▁to ▁produce ▁the ▁b iod ies el . ▁For ▁example , ▁b iod ies el ▁produced ▁from ▁low ▁er uc ic ▁acid ▁vari eties ▁of ▁can ola ▁seed ▁( R ME ) ▁starts ▁to ▁gel ▁at ▁approximately ▁. ▁B iod ies el ▁produced ▁from ▁be ef ▁t allow ▁and ▁pal m ▁oil ▁tends ▁to ▁gel ▁at ▁around ▁ ▁and ▁ ▁respectively . ▁There ▁are ▁a ▁number ▁of ▁commer cially ▁available ▁add it ives ▁that ▁will ▁significantly ▁lower ▁the ▁pour ▁point ▁and ▁cold ▁filter ▁plug ging ▁point ▁of ▁pure ▁b iod ies el . ▁Winter ▁operation ▁is ▁also ▁possible ▁by ▁bl ending ▁b iod ies el ▁with ▁other ▁fuel ▁o ils ▁including ▁# 2 ▁low ▁sul fur ▁dies el ▁fuel ▁and ▁# 1 ▁dies el ▁/ ▁k eros ene . ▁ ▁Another ▁approach ▁to ▁facil itate ▁the ▁use ▁of ▁b iod ies el ▁in ▁cold ▁conditions ▁is ▁by ▁employ ing ▁a ▁second ▁fuel ▁tank ▁for ▁b iod ies el ▁in ▁addition ▁to ▁the ▁standard ▁dies el ▁fuel ▁tank . ▁The ▁second ▁fuel ▁tank ▁can ▁be ▁ins ulated ▁and ▁a ▁he ating ▁co il ▁using ▁engine ▁cool ant ▁is ▁run ▁through ▁the ▁tank . ▁The ▁fuel ▁t anks ▁can ▁be ▁switched ▁over ▁when ▁the ▁fuel ▁is ▁sufficiently ▁warm . ▁A ▁similar ▁method ▁can ▁be