After filling gas tank with either 87 or 93 gasoline, the engine sporadically loses power. Even while idling, the power will drop to less than 100rpm. I have had to restart the vehicle twice due to this issue. Even driving at highway speeds, you will need to remove foot from the gas pedal and let it gain power again before accelerating. This issue has almost caused me to run off a cliff and almost caused 3 different accidents.