Five Corner Pantry Stores and Highway 281 Travel Center are being charged with mislabeling the octane level of their gasoline.
The companies were selling 85 and 87 level octane as 89 octane.
With people unknowingly putting the wrong level of gasoline in their vehicles KSFY News asked local mechanics if there could be any repercussions.
Mark Herman, a technician at Harr motors, said using the wrong level in your car once or twice won't be too drastic.
"You're not going break down or anything, but generally if you go pass somebody on the highway you may feel the vehicle be a bit sluggish," Herman said. "The car won't be all there."
If you continue to put the wrong level of gasoline in your car you could potentially face long-term engine issues.
The mechanics we spoke with also added most of the newer models of cars have sensors that detect the level of octane and adjust accordingly.