Well I had to run some errands & ran the gas down to the red & only got 230miles out of the tank of gas & when I filled it up $35 worth, lol I drove the car another 45 miles & not once did it bog or studder, so maybe it was "bad gas-water" because it hasn't done it since! I also picked a Bosch o2 sensor up brand new at autozone, thanks "cprtyler" & I haven't installed it yet! Should I continue drivin the car until it acts up again & if it does, replace the sensor?