" ▁as ▁a ▁mon o - alk yl ▁est er . ▁ ▁Bl ends ▁ ▁Bl ends ▁of ▁b iod ies el ▁and ▁conventional ▁hydro car bon - based ▁dies el ▁are ▁most ▁commonly ▁distributed ▁for ▁use ▁in ▁the ▁ret ail ▁dies el ▁fuel ▁market place . ▁Much ▁of ▁the ▁world ▁uses ▁a ▁system ▁known ▁as ▁the ▁" B " ▁factor ▁to ▁state ▁the ▁amount ▁of ▁b iod ies el ▁in ▁any ▁fuel ▁mix : ▁▁ 1 0 0 % ▁b iod ies el ▁is ▁referred ▁to ▁as ▁B 1 0 0 ▁▁ 2 0 % ▁b iod ies el , ▁ 8 0 % ▁pet rod ies el ▁is ▁l abeled ▁B 2 0 ▁▁ 5 % ▁b iod ies el , ▁ 9 5 % ▁pet rod ies el ▁is ▁l abeled ▁B 5 ▁▁ 2 % ▁b iod ies el , ▁ 9 8 % ▁pet rod ies el ▁is ▁l abeled ▁B 2 ▁ ▁Bl ends ▁of ▁ 2 0 % ▁b iod ies el ▁and ▁lower ▁can ▁be ▁used ▁in ▁dies el ▁equipment ▁with ▁no , ▁or ▁only ▁minor ▁modifications , ▁ ▁although ▁certain ▁manufact ur ers ▁do ▁not ▁extend ▁war rant y ▁coverage ▁if ▁equipment ▁is ▁dam aged ▁by ▁these ▁bl ends . ▁The ▁B 6 ▁to ▁B 2 0 ▁bl ends ▁are ▁covered ▁by ▁the ▁A ST M ▁D 7 4 6 7 ▁specification . ▁B iod ies el ▁can ▁also ▁be ▁used ▁in ▁its ▁pure ▁form ▁( B 1 0 0 ), ▁but ▁may ▁require