ok so i went to go start my car yesterday and it was trying to start, but wouldnt turn over. my gauge was in between E and 1/4 so i thought maybe its inaccurate so i walked to the gas station and put more in. After about two or three tries it fired up and thought my problem was resolved. today after school i went to start it and it didnt turn over (tank filled). i tried again and it turned over just fine. anyone know what this may be? i only have 47k and a powertrain warranty... should i take her in?