
P.i. Performance Improver Gasoline Additive
Product code : APICN-EA
• Restores up to 14% horsepower1
• Reduces need for costly higher-octane fuel
• Reduces noise from carbon rap and pre-ignition
• Controls pre-ignition "knock"
1Based on third-party testing in a 2016 Chevrolet* Silverado* 1500, 5.3L V-8 GDI with 100,616 miles, using one tank treated with AMSOIL P.i. Actual results may vary.
• Restores up to 14% horsepower1
• Reduces need for costly higher-octane fuel
• Reduces noise from carbon rap and pre-ignition
• Controls pre-ignition "knock"
1Based on third-party testing in a 2016 Chevrolet* Silverado* 1500, 5.3L V-8 GDI with 100,616 miles, using one tank treated with AMSOIL P.i. Actual results may vary.
P.i. Performance Improver Gasoline Additive
Concentrated detergent aggressively cleans stubborn, power-robbing deposits from injectors, valves and the combustion chamber. Reduces emissions. Effective in port and direct injection systems. Bottle compatible with capless fuel systems. Cleans entire fuel system in one tank of gasoline.
See the Product Data Bulletin for full details.
REMOVES STUBBORN DEPOSITS TO RESTORE POWER AND PERFORMANCE - AMSOIL P.i. restores up to 14% horsepower in one tank of gasoline.1
- Fights intake valve and combustion chamber deposits which helps restore power, control knock and reduce the need for higher-octane fuels.
- Restores GDI fuel injectors up to a 100 percent flow rate.2
1Based on third-party testing in a 2016 Chevrolet* Silverado* 1500, 5.3L V-8 GDI with 100,616 miles, using one tank treated with AMSOIL P.i. Actual results may vary.
2ASTM D5598(M) – 2013 Buick Regal test vehicle.
See the Product Data Bulletin for full details.
*All trademarked names and images are the property of their respective owners and may be registered marks in some countries. No affiliation or endorsement claim, express or implied, is made by their use.
P.i. Performance Improver Gasoline Additive
SDS
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G2543: A Study in Performance
Download the G2543: A Study in Performance
WARRANTY
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Data Bulletins
Download the Data Bulletins
P.i. Performance Improver Gasoline Additive
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PIBy  CLIFFORD,  a  Verified Buyer  from  Greensburg, Pa.  on  April 14, 2021Switched from using other products to all Amsoil a few years ago, could not be happier with the performance gain.Bottom LineYes, I would recommend this to a friend.
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Most effective fuel system cleaner I've usedRead reviews online and publications from Amsoil, but after searching various forums where I knew information would be as unbiased as possible I decided to try this. I used it in three different vehicles, 2001 Land Rover Discovery (4.0 V8 160K), 2008 Chevy Tahoe (5.3 V8 157K) and 2015 (3.5 V6 40K) Jeep Wrangler. Each had different results. The Land Rover immediately idled smoother. It is a torquey but low HP motor so performance seemed about the same. Nonetheless, definitely smoother across the board. The Tahoe had been idling a bit rough prior to use and everything had been cleaned up as much as possible following a head removal for lifter fix recently. I suspected injectors since I knew there were no other vacuum leaks or issues. This truck was the one that triggered the search for injector cleaners to see what the market looked like. By the end of the tankful it idled almost like it did when I first got it and it got REALLY quiet when at idle. Mid to upper RPM full throttle pulls felt MUCH stronger. 3500-5000 RPM it pulls hard now. I forgot how strong this engine was. Smooth since then two tankfuls ago. The Jeep didn't change much. It had been running mostly fine, but it was the one of the three that I noticed white smoke from much like a direct injection of cleaner through an intake. Despite being the lowest mileage of the group it gets the most city driving and start and stop as well as slightly longer oil change intervals. I suspect it built up a relatively high amount of carbon for age. I've tried products in other vehicles and this appears to be the only one where I've noticed differences beyond the placebo effect. Like most Amsoil products it is not "cheap" but whatever cleaners they put in this it is VERY concentrated. Injector cleaning and carbon removal seem substantial. I wish I would have put a borescope in the cylinders just to see what it did exactly. I would recommend.Bottom LineYes, I would recommend this to a friend.
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Performance ImproverUse at every oil change. Cleans injectors. Engine runs smooth. You can tell if you do not use it. Better mpg. It just works plain and simple.Bottom LineYes, I would recommend this to a friend.
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Works As AdvertisedMy car seems to have more power when I'm running this in the fuel and I never have fuel related problems with injectors.Bottom LineYes, I would recommend this to a friend.
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Excellent productI use every 5,000 miles. Helps keep my old jalopy run like new.Bottom LineYes, I would recommend this to a friend.
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Excellent fuel treatment.Every time I buy an oil change, I always buy fuel treatment. Works well.Bottom LineYes, I would recommend this to a friend.
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Great for GDI engineBy  ALEX,  a  Verified Buyer  from  Innisfail Alberta, Canada  on  March 31, 2021Amsoil oil filters have kept our 2 Hyundai engines in excellent shape. They are part of the Amsoil oil change that includes Signature 5W20 oil, upper cylinder treatment, and PI fuel treatment. Bought since new, the cars (Sonata 2013; Elantra 2014) perform very well and we plan to keep them as long as possible. Amsoil products and the Amsoil team are offering the best products. They are trustworthy and stand behind their products 100%.Bottom LineYes, I would recommend this to a friend.
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Smoothed Out IdleWorks wonders I tell you. My 2013 Toyota Highlander with 70k tends to idle rough and this fixes that issue. Seems to be doing it’s job at cleaning the cheap Costco gas that I use.Bottom LineYes, I would recommend this to a friend.
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Actually works well, I used to get 29 highway, now I get 32 with the combination of everything. Stuff works wondersBottom LineYes, I would recommend this to a friend.
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best gas additivekeeps my engine running like a champ and the gas mileage is greatBottom LineYes, I would recommend this to a friend.