There are two different oil pans. the square bottom one (4.75Qts) and the round bottom one(4.25Qts). The DOHC 2.5l engines all have the square one to my knowledge. The round ones are on 2.5 SOHC and late model 2.2l (95-on) 2.2l prior to 95 had both of them and I haven't figured out the rhyme or reason to that one yet.