Promotion: AMSOIL P.i. for $5
Effective Dates: Feb. 25-March 10, 2026
Promo Code: PI226
AMSOIL P.i. is a potent gasoline performance improver with 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 entire fuel system in one tank of gasoline. For use with cars and trucks. Treats up to 30 gallons. Add entire bottle to tank at fill-up. For best results, clean your fuel system with P.i. every 4,000 miles (6,400 km). Do not use with diesel or two-stroke engines.
MAXIMUM DEPOSIT CLEAN-UP
- Helps keep valves clean and moving freely.
- Aggressive additives attack the most common forms of engine deposits and limit their effects.
REMOVES FUEL-INJECTOR DEPOSITS
- P.i. removes deposits and keeps injectors functioning as they should.
- Testing shows P.i. restored GDI fuel injectors to a 100% flow rate after one tank of fuel.2
RESTORES HORSEPOWER
- Third-party testing demonstrated performance of P.i. using a 2016 Chevrolet* Silverado* with 100,616 miles on the odometer.
- Following a single treatment with P.i., the truck measured an incredible 14% improvement in horsepower.1
Feb. 25, 2026
For a limited time, Preferred Customers and online/catalog customers can grab a bottle of AMSOIL P.i.® for just $5 when they use code PI226 at checkout. Offer ends March 10, 2026.
Promotion: AMSOIL P.i. for $5
Eligible Participants: Preferred Customers and online/catalog customers
Effective Dates: Feb. 25-March 10, 2026
Promo Code: PI226
Disclaimer:
- Exclusive offer for AMSOIL Preferred Customers and online/catalog customers.
- Valid through 11:59 p.m. Central March 10, 2026.
- Limited to one 16-oz. bottle of AMSOIL P.i. (APICN/CPICN) for $5.
- Use code PI226 to apply price adjustment, if eligible, at checkout.
- Offer may be modified or terminated at any time except as prohibited by law.
- Offer may be combined with other offers.
