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Frequently Asked Questions

Your questions and comments are important to us. Browse through our frequently asked questions below.

About ARCO's Quality TOP TIER™ Gas

What is TOP TIER™ gas?

What do different octanes mean?

Which cars should use premium gas?

Are over-the-counter fuel-additive treatments beneficial to my car's performance?

What about using ethanol-blended gasoline in smaller engines, motorcycles, snowmobiles and boats?

I have more questions about ARCO gasoline. Where can I get more information?

How is ARCO gasoline affiliated with Tesoro Corporation?

Payment & Card Questions

What are some of ARCO’s convenient payment card options?

Why is there a 35 cent convenience fee for the user of PIN debit cards?

What is Mobile Wallet?

How does Mobile Wallet work?

upper-midwest?

Are Mobile Wallet payments secure?

Does this change the type of payment methods that are accepted?

What Mobile Devices allow for Mobile Wallet payment?

Additional Information

Are there ARCO stations throughout the United States?

How is ampm affiliated with Tesoro Corporation?