a proper oil pan will save your motor from running out of oil and its a cheap investment. if your burning oil, that is something that should be looked into. adding 1/2-1 quart everytime you go out is not a good sign. if your oil pressure is between 40-70 psi, then obviously your getting oil pressure. if it aint broke, you "dont" gotta fix it, yet. if it runs good and your getting good oil pressure, than you could leave it the way it is. good oil pans are usually in the $250-500 range, compared to the cool chrome oils pans at autozone for $40 bucks. whatever works.