How can you improve fuel economy for a 1990-1995 Toyota 4runner 3L engine?

do not drive at all

get unlimited towing package and tow your car from home to work and back

when you see pedestrain walk sign flashing on the side of the road step of the gas and switch to neutral until you stop at the light.

change gasoline recirculation canister

change your filter or cut a hole in the center of the paper filter. cut a piece of blanket , carefully glue the PC of blanket to the corner of the filter, some overlap between filters paper and PC of blanket is required.

add fuel cleaner once in a month

20% fule saving for sure