Its an automatic. I am getting about 32mpg at this point. I just inflated the tires to mid 40's. I just changed the oil to mobil 1 synthetic. When i coast i try to put the car in neutral. Its fine except when I take it out of neutral and put it back in drive. The car seems to have a slight jolt(foot is not on accelerator). Its a subtle jolt but its there. Should I avoid putting the car in neutral when coasting?