would u get a nistune or whatever for this spec?

[alan opel]

mapped 100's of apexi neo's,in everysort of car,i run one in my own skyline,what u wanna know

could it b set up with a wideband handy enough? how efficent are they? like its a cunt on petrol as it is, would it b much worse? ive heard a well mapped nistune would evenr b better on petrol than at the moment!