I traveled from Roswell NM to Albuquerque NM, which is 201 miles. I got to Clines Corners NM which is 140 miles away from Roswell and I was almost on empty!! Is this average for long distance drives? So I filled up and got to Albuquerque, I changed the O2 sensors and the spark plugs, but it seems to still be doing poorly on gas mileage. I have factory injectors and fuel pump, so any Ideas would be greatly appreciated!!