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Welcome to our new MyFuelPortal customer account site. If you are an existing customer and have not created your account yet, please click the Register link to get started.

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Existing Customer?
If you are a current Customer of Diamond Oil Co., but have never used MyFuelPortal, provide your Customer Number and Email Address to get started.

On February 1, 2025, Diamond Oil Company was acquired by Heritage Petroleum.

Please call 1-800-422-7563 for account information and payment options , as these items are no longer available in the portal.

Thank you for being part of our journey. We look forward to serving you!

Please contact us if you have any questions:

Main Office: (515) 244-4271

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