Can different types of gasoline be mixed?

[Shannon]

Gasoline can be mixed. There won't be obvious problems in the short term when mixing different grades or types of gasoline. Carbon deposits and fuel system blockages are caused by long-term mixing. Effects of accidental mixing: Don't worry too much about mixing gasoline: When different grades of gasoline are mixed, no special maintenance is required. Just refuel with the appropriate grade as specified by the vehicle when conditions permit. Long-term mixing: Frequent mixing may have certain impacts: The engine may not receive optimal support or may be over-supported, both of which can affect engine performance. Long-term mixing may eventually lead to engine problems. However, an occasional mistake in refueling isn't a big issue - as long as it's not diesel, the impact should be relatively minor.