U.S. Pay at the Pump Suggestion for Canadian Credit/Debit Cards / Canadian Addresses

[Burgerwars]

From RBC's website:

 

Some U.S. merchants, such as pay-at-the-pump gas stations and self-pay kiosks, often require you to enter a U.S. zip code to complete your transaction. Enter the U.S. zip code associated with your card, or if you have a Canadian address associated with your card, we suggest entering the three digits of your Canadian postal code followed by two zeroes or paying inside.