led ▁entirely ▁by ▁b iod ies el ▁fuel . ▁Since ▁ 2 0 0 7 , ▁the ▁Royal ▁Train ▁has ▁operated ▁successfully ▁on ▁B 1 0 0 ▁( 1 0 0 % ▁b iod ies el ). ▁ ▁Similarly , ▁a ▁state - owned ▁short - line ▁rail road ▁in ▁Eastern ▁Washington ▁ran ▁a ▁test ▁of ▁a ▁ 2 5 % ▁b iod ies el ▁/ ▁ 7 5 % ▁pet rod ies el ▁bl end ▁during ▁the ▁summer ▁of ▁ 2 0 0 8 , ▁purch asing ▁fuel ▁from ▁a ▁b iod ies el ▁producer ▁s ited ▁along ▁the ▁rail road ▁tracks . ▁The ▁train ▁will ▁be ▁power ed ▁by ▁b iod ies el ▁made ▁in ▁part ▁from ▁can ola ▁grown ▁in ▁agricult ural ▁regions ▁through ▁which ▁the ▁short ▁line ▁runs . ▁ ▁Also ▁in ▁ 2 0 0 7 , ▁Disney land ▁began ▁running ▁the ▁park ▁trains ▁on ▁B 9 8 ▁( 9 8 % ▁b iod ies el ). ▁The ▁program ▁was ▁dis cont in ued ▁in ▁ 2 0 0 8 ▁due ▁to ▁storage ▁issues , ▁but ▁in ▁January ▁ 2 0 0 9 , ▁it ▁was ▁announced ▁that ▁the ▁park ▁would ▁then ▁be ▁running ▁all ▁trains ▁on ▁b iod ies el ▁manufact ured ▁from ▁its ▁own ▁used ▁cook ing ▁o ils . ▁This ▁is ▁a ▁change ▁from ▁running ▁the ▁trains ▁on ▁so y - based ▁b iod ies el . ▁ ▁In ▁ 2 0 0 7 , ▁the ▁historic ▁M t . ▁Washington ▁C og ▁Railway ▁added