Mobil 1 National 2026 Sweepstakes: motor oil purchase routes and free mail-in entry

What this promotion offers

Mobil 1’s National 2026 promotion is useful for drivers already buying oil because it combines receipt-based entry routes with a free mail-in alternative. The important part is choosing the correct entry method and respecting the receipt, postmark and entry-limit rules.

Mobil 1’s National 2026 promotion uses several entry routes, including qualifying Mobil 1 motor oil purchases, installed oil-change purchases and a no-purchase mail-in method.

Prize and main appeal

Sweepstakes entry tied to the Mobil 1 National 2026 offer; official rules also explain purchase and free mail-in entry routes.

The goal of this page is to make the official promotion easier to understand before you enter: who it is for, what the reward is, which dates matter and where the rules can be checked.

Who can enter

• Open only where the official Mobil 1 rules allow participation.
• Purchase routes generally require five quarts or more of eligible Mobil 1 motor oil, or an installed oil change with at least five quarts.
• A free mail-in entry method is available in the official rules.
• Purchase entries require a receipt from the eligible purchase period.
• Mail-in entries must follow the exact address and deadline stated in the rules.

How to enter step by step

1. Read the Mobil 1 official rules before choosing an entry route.
2. For purchase entry, buy the required Mobil 1 product at an eligible retailer or installed location during the stated period.
3. Submit the official entry form and receipt online where the rules allow it, or mail the required documents.
4. For free entry, hand-print the required details on a 3x5 postcard and mail it to the official free-entry address.
5. Keep copies of receipts or mailed materials until the promotion is complete.

Dates, validation and important notes

The official rules separate the promotion into online purchase entry, mail-in purchase entry, installed-location purchase entry and a free mail-in entry. Each route has its own document requirements and limits, so the safest approach is to follow the official rules line by line.

• Standard participating-retailer purchases run May 1, 2026 through August 31, 2026.
• O’Reilly Auto Parts has a separate purchase window listed as May 27, 2026 through July 28, 2026.
• Mail-in entries for purchase routes must be postmarked by August 31, 2026 and received by September 8, 2026.
• The rules list limits for combined entries by entry method, so do not assume unlimited entries.

Before you enter

Check whether your retailer, product quantity and purchase date are eligible before submitting. If you use the free mail-in route, copy the address exactly from the official Mobil 1 rules.

• Use only the official sponsor page linked here.
• Keep receipts, account access, confirmation emails or mailed-entry copies when the rules require them.
• Be cautious with unofficial accounts asking for payment, banking details or sensitive information.