AMSOIL PI Performance Improver – Fuel additive tested, proven highlights

Meet the AMSOIL PI Performance Improver. (P.i.)  AMSOIL fuel additive for gasoline powered engines, including marine, off-road, stationary.  But AMSOIL has it all covered.  Gasoline, diesel and small engine fuel additive prices and information links. 

Banner with pickup and catalog. Reads AMSOIL P I Performance Improver. Links here. Retail or wholesale options. Prices.


Following is a long list of the benefits of AMSOIL P I Gasoline Additive.  AMSOIL PI is tested and proven against fuel additive market products to be the most potent of fuel injection cleaners

PI is a concentrated detergent, unsurpassed in cleaning combustion chamber deposits, intake valve deposits and port fuel injector deposits.  Not only does this fuel additive restore vehicles that have been around awhile, AMSOIL P I helps maintain peak engine efficiency, fuel economy, power and drivability in newer, low mileage engines. 

AMSOIL Fuel System Cleaner    Best Fuel Injector Cleaner    AMSOIL P I Prices     

AMSOIL Preferred Customers Save


Before you check out the P I highlights for the best fuel additive on the market, let’s talk about how much you might need.  Frankly, this is real life.  If you have more than one vehicle AND daughters and sons and friends who will want a bottle or three of AMSOIL P I Performance Improver….. well, that $30 or so savings on the case more than pays for an annual membership and easily saves you money, right off.

For fuel injected and carburated systems.  In engines with accumulated deposits, testing showed AMSOIL P I provided these clean-up benefits after only one tank of gasoline.

Bottle of AMSOIL Performance Improver, PI, the best fuel additive.

  • Cleans combustion chambers.
  • Cleans back of plates, idle air passages, fuel portals.
  • P I cleans fuel injectors.
  • Increases fuel economy.   AMSOIL P I testing yielded improvement of up to 5.7 percent.
  • Reduces engine octane requirement, saving money at the pump.
  • Restores power, acceleration and drive-ability to “like new” condition.
  • Reduces emissions and helps vehicles pass emission tests.   Up to 15 % reduction hydrocarbon emissions.  Up to 26 % reduction carbon monoxide emissions.   Up to 17 % reduction nitrous oxide emissions.
  • Avoids necessity of your mechanic’s fuel system cleaner service which can be quite expensive.


Same banner with catalog for ordering or info.Click images to order, but first, how about saving some cash too.  Our customers come back for AMSOIL P I by the case, most ordering wholesale.  You can too.  You are welcome to order retail, but…. how about that real discount?  See, your best price is by ordering through AMSOIL as a preferred customer.  $10 for a no-obligation membership. This gives you 20 – 25% off any order.  Just place a membership in your cart from this link to see what your prices will be by bottle or case.  After you check both prices, then you can remove the membership if you want to pay retail.

The links take you to directly to the secure storefront.  All AMSOIL orders must include a dealer number or ZO # and ours is 1755968.  Thanks.  So your referral dealer ID is 1755968R. Then you will receive your own number.  If you think you can work with us, use us.


BOTTLE —- ORDER AMSOIL P I Performance Improver —- UNIT – 12 oz. bottle

CASE —- ORDER AMSOIL P I Performance Improver —- CASE – 12 bottles




Your dealer referral number is ZO1755968R .

After you are registered, you will receive an AMSOIL ZO account number.

Get dealer’s prices with a 6-month membership for $10 or $20 for one year.  No obligations.

Order Monday – Friday 7AM until 5PM Central Time

Little AMSOIL shopping facts……


Fuel System Cleaner and more…

Gasoline Additive Concentrate

AMSOIL P.i. Delivers Maximum Performance

AMSOIL fuel additive brochure

Read the technical brochure and see before and after images here…..










AMSOIL P I Brochure on PI Documents Unsurpassed Deposit Clean-up

Same image of cleaned fuel injector.We don’t get to see it often.  But that is an image of what the port fuel injectors are supposed to spray.  Port fuel injector deposits form after the engine has been shut down. When there is no gasoline flowing through the injectors during the hot soak period, the injectors do heat up and gasoline that remains in the injectors degrades to form deposits.  The fuel injector and engine deposits happen very quickly if there is poor quality gasoline and/or short trip driving. But the clearances within the injectors are so tight that the injectors must deliver precise amounts of atomized fuel. So even small amounts of deposits cause injectors to malfunction. When fuel flow is reduced, the spray patterns are disrupted. This decreases your engine efficiency, power and fuel economy. And increases exhaust emissions.

Intake Valve Deposits also form.

The valves with deposits will restrict airflow, altering these patterns in the cylinder. Disrupted balanced air/fuel ratio can cause valve sticking. If these deposits restrict proper seating, the valves may be burned.

  • If intake valve deposits can cause lost engine power, increased emissions, poor engine efficiency and potential valve failure, then removal of these deposits or deterring their accumulation will benefit.

Cover of the P.I. Performance Improver Brochure. Copyright AMSOIL INC.

Here is the link to read the brochure titled, P.i. Unsurpassed.

Here is the link to the product on our secure AMSOIL website. Image of the bottle.AMSOIL P.i. Best fuel injector cleaner on the market.

The diesel fuel system cleaner.

The small motors fuel treatment.

Here is the link to become an AMSOIL member and get the product at the same prices we pay. Or you can order at retail prices. No problem.

While you are here, browse the online AMSOIL catalog for more ideas on products.

Banner with truck, catalog and AMSOIL dealer.

Or order a free AMSOIL catalog from this page.
Diane E Adams, Independent AMSOIL Dealer
Have you heard all the AMSOIL products slogans and seen the posters?  Go here for our page….
AMSOIL P I Performance Improver is the BEST FUEL INJECTOR CLEANER to us,
and repeat customers seem to be convinced from experience.
One tank treated with P.I. Fuel Injection Cleaner restores ‘like-new’ drive-ability.
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