2023 November Promo – Injector cleaner for gasoline and diesel fuel

November 8, 2023

Pi and Diesel all in one customer promo

The Injector cleaner for gasoline and diesel fuel

The Promo offer is a bottle of injector cleaner for gasoline or diesel fuel. AMSOIL P.i.® or Diesel-All-In-One for just $5 when they purchase $49 or more. These top-tier injector cleaners for gasoline and diesel fuel offer benefits like enhanced fuel performance and engine cleanliness. Plus, they ensure peak engine protection when paired with AMSOIL synthetic oils.


AMSOIL P.i.® is a potent gasoline performance improver with a concentrated detergent that aggressively cleans stubborn, power-robbing deposits from injectors, valves, and the combustion chamber. Effective in port and direct injection systems. Bottle compatible with capless fuel systems. Cleans the entire fuel system in one tank of gasoline.

For use* with cars and trucks. Treats up to 30 gallons. Add the entire bottle to the tank at fill-up. Clean your fuel system with P.i. every 4,000 miles (6,400 km) for best results.

*Do not use with diesel fuel, E85 or 2-stroke mixed fuel.

Data Sheet


Diesel All-In-One is specially engineered to provide exceptional all-season diesel fuel protection for a serious performance boost. One dose delivers outstanding detergency, improved lubricity, better cold flow and higher cetane.

Data Sheet


Eligible Participants: Preferred Customers and Online/Catalogue customers

Effective Dates: Nov. 8 – Nov. 21, 2023

Promo Code: 5PI (or) 5DX



Enter Promo Code*: 5PI (or) 5DX

View your cart to enter the PROMO Code.


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How to redeem

Existing Customers:  Log into your AMSOIL account to ensure proper pricing is applied. Or, call AMSOIL Customer Service at 800-777-7094 between 7 a.m. and 7 p.m. CT Monday–Friday. Provide your customer number and promotional code to the representative.

First-time customer: ( for Canada) use the Promo Code when checking out. Orders can also be made by phone at AMSOIL Customer Service at 800-777-7094 between 7 a.m. and 7 p.m. CT Monday–Friday and ask for the Promo Code to be applied. We appreciate you using our referral number “323230”.

Online orders shop



*Exclusive offer for Preferred Customers and Online/ catalogue customers.

  • Valid through 11:59 p.m. Central Nov. 21, 2023.
  • Offer applies only to current orders of $49 or more based on subtotal with savings.
  • Applies only to 12-oz/437-ml bottle of P.i.® (APICN/CPICN) (or) 16-oz./355-ml bottle of Diesel All-In-One (ADBCN/ADBCNC).
  • Add the product to your cart to redeem and use code 5PI for $5 P.i. (or) 5DX for $5 Diesel All-In-One to apply a price adjustment to $5.
  • Offer may be modified or terminated at any time except as law prohibits.
  • Offer not available in Alaska or Hawaii.

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