Choice of gasoline plays an important role in your Bimmer's performance, there are many grades of gasoline and every owner needs to know what is the MINIMUM octane level for the car. This is the same for other makes and models. Whether you are driving a Hyundai, Mercedes or a Porshe, DO NOT at anytime use anything less then the manufacturer's guide. Using higher octane fuel increases performance of the car, it burns better and more complete. Bear in mind that the cost also increase significantly as you climb the octane ladder.

Check your Gas Cap. See the Recommended Octane

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