From the many different answers given here, that confirms my thought that there is too much misinformation in manuals. Both my 91 and 93 Explorer(4dr.) had tanks the same basic capacity as my 98 and 99 truck, my three 91 LSC's, 85 and 86 Crown Vic, 72 Gran Torino, two 95 Crown Vics, and an 85 Mark VII. They all have taken near and over 21 gallons for me. Basically they are all 22 gallon tanks, Ford made them that size purposefully. Please don't nitpick the differences between written specs in various manuals. Rely more on the experience of yourself and others, than a book. Regards,