[92gxe/cg2]

Overdrive is 4th gear, why would u want that off for better mileage? If you leave overdrive on your car will shift into 4th gear under light acceleration at pretty low speeds (i think in my auto 3rd gen it was like 25) bringing the engine speed down therefore giving you better gas mileage, so you might want to start leave OD on. Although it can be said that when driving around town at low speeds with alot of stops its better to leave OD off to prevent the trans from "gear hunting" if your hitting 45 i see no problem in leaving it on. I never took it off and im sure most ppl on this site dont either.