2005 Xg 350l

How good are these on gas?

My school is about 2 miles and my job is about 12-15. Will I be fillinf up alot?

Yes that is the drain plug. Only XG that had a filter was early 01 with a spin on filter in the top of the trany. But is not used now! Some early 00 an 99 sonata have this filter on top!