I use Xylitol after I swish with oil and rinse with Sea Salt water. I swish Xylitol around my mouth for a few minutes.
It's not a good replacement for oil, because oil is a totally different animal. Xylitol would be very helpful to further your dental health though, and we brush our teeth with it, use the mouthwash, chew the gum, and use it to sweeten out food.