New AMSOIL Preferred Customer and Online Customer Promo Code - $5 Fuel Stabilizer

For a limited time, Preferred Customers and online/catalog customers can get a bottle of AMSOIL Gasoline Stabilizer for $5 when they use code 5GS1025 at checkout. Offer ends Oct. 21, 2025.

Promotion:  AMSOIL Gasoline Stabilizer for $5
Eligible Participants:  Preferred Customers and online/catalog customers
Effective Dates:  Oct. 8-21, 2025
Promo Code:  5GS1025

​Disclaimer:

• Exclusive offer for AMSOIL Preferred Customers and online/catalog customers.
• Valid through 11:59 p.m. Central Oct. 21, 2025. 
• Limited to one 16-oz. bottle of AMSOIL Gasoline Stabilizer (ASTCN/ASTCNC) for $5. 
• Use code 5GS1025 to apply price adjustment, if eligible, at checkout.
• Offer may be modified or terminated at any time except as prohibited by law.   
• Offer not valid in Alaska or Hawaii. 
• Offer may be combined with other offers.

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