 The 95.3 MNC Gas Gauge. In Mishawaka, the Mobile 711 on North Main Street is at $3.25 a gallon. $3.24 if you use cash in Elkhart at the Marathon on East Bristol Street. In Plymouth, the Murphy USA on North Oaks at $3.34. Walker Roos' BP on East Waterford's at $3.39. And the Amoco on 12 in Edwardsburg is at $3.45 a gallon.