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This SAE Recommended Practice was developed to standardize fuel inlet closure colors and verbiage by fuel type primarily for passenger car and truck applications, but it can be applied to marine, industrial, lawn and garden, and other similar applications.

The purpose of this document is to establish standardized colors and text on the fuel inlet closure for various automotive fuels. By following this recommended practice, instances of refueling vehicles with the wrong fuel which can lead to damage to the vehicle engine and its emission control system can be avoided.