▁engine ▁performance ▁depends ▁on ▁the ▁properties ▁of ▁the ▁fuel , ▁as ▁well ▁as ▁on ▁comb ust ion , ▁inject or ▁pressure ▁and ▁many ▁other ▁factors . ▁Since ▁there ▁are ▁various ▁bl ends ▁of ▁b iod ies el , ▁that ▁may ▁account ▁for ▁the ▁contradict ing ▁reports ▁as ▁regards ▁engine ▁performance . ▁ ▁See ▁also ▁▁ ▁MY ▁Ad y ▁Gil ▁ ▁C iv ic ▁amen ity ▁site ; ▁collection ▁point ▁for ▁W VO ▁ ▁E co J et ▁concept ▁car ▁ ▁Food , ▁Conserv ation , ▁and ▁Energy ▁Act ▁of ▁ 2 0 0 8 ▁ ▁Gas oline ▁gall on ▁equivalent ▁ ▁S ust ain able ▁bio f uel ▁ ▁Table ▁of ▁bio f uel ▁c rop ▁yields ▁ ▁T onne ▁of ▁oil ▁equivalent ▁ ▁Veg et able ▁oil ▁economy ▁ ▁Veg et able ▁oil ▁fuel ▁ ▁F uel ▁( film ) ▁ ▁United ▁States ▁vs . ▁Imperial ▁Pet role um ▁ ▁References ▁▁ ▁An ▁Over view ▁of ▁B iod ies el ▁and ▁Pet role um ▁Dies el ▁L if ec y cles , ▁May ▁ 1 9 9 8 , ▁She e han , ▁et ▁al . ▁N RE L ▁( 6 0 pp ▁pdf ▁file ) ▁ ▁Business ▁Management ▁for ▁B iod ies el ▁Produ cers , ▁January ▁ 2 0 0 4 , ▁Jon ▁Von ▁Ger pen , ▁Iowa ▁State ▁University ▁under ▁contract ▁with ▁the ▁National ▁Ren ew able ▁Energy ▁Labor atory ▁( N RE L ) ▁( 2 1 0 pp ▁pdf ▁file ) ▁ ▁Energy ▁bal ances ▁in ▁the