Fuel tankage as follows.
412
S/N 33001-33107 211.4 U.S. gal. usable
S/N 33108 thru 33213, 36001 thru 36086 330.5 U.S. gal
S/N 33108 thru 33213, 36001 thru 36086, 412EP
With Left or Right Auxiliary Tank 412.1 U.S. gal
With Both Left and Right Auxiliary Tanks 493.8 U.S. gal. Usable
S/N 33001 thru 33107
With Left or Right Auxiliary Tank 293 U.S. gal
With Both Left and Right Auxiliary Tanks 374.7 U.S. gal.
412EP
330.5 U.S. gal
412CF
317.3 U.S. gal
With Left or Right Auxiliary Tank 399.0 U.S. gal
With Both Left and Right Auxiliary Tanks 480.7 U.S. gal