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Discussion Starter #1 (Edited)
AMSOIL P.I. (Performance Improver)
AMSOIL P.I. is fuel additive that cleans the top end of your engine.

Specifications:
Application: Gasoline Cruzes only
Application rate: One bottle treats up to 20 gallons of fuel.
Recommended application interval: every 4,000-5,000 miles

44.4% to 53.8% Hydrocarbon Solvent
27.7% to 36.9% PolyEther Amine (PEA)

Benefits:
AMSOIL P.I. is the most potent top end cleaner on the market. It uses PEA (PolyEther amine) as a cleaning agent, which is widel accepted as the most effective top end cleaner for engine use. AMSOIL P.I. cleans valves, pistons, combustion chambers, and fuel injectors with results that can be verified with a borescope.

Fuel system deposits can cause lost fuel economy, reduced power, poor throttle response, failed emissions tests, poor drivability (surging, hesitation, stalling, rough idle), engine knocking (pinging), and difficult starts. AMSOIL PI cleans these deposits to restore power, fuel economy, and emissions to OEM levels.

Over time, fuel and vaporized oil (from the PCV) leavee deposits on fuel injectors, valves, pistons, and combustion chambers. In injectors, this compromises the atomization of fuel, resulting in reduced power, reduced fuel economy, and increased emissions. On intake valves, this compromises the airflow entering the cylinder and the air to fuel mixture, in addition to compromising the intake valve's seal to the valve seat, which results in poor valve cooling. In pistons and combustion chambers, these deposits create hot spots that cause detonation and ultimately knock retard, which reduces power and fuel economy.

Some of the oil consumption issues that plague modern engines are in fact caused by low drag (aka low tension) piston rings becoming gummed up with deposits. These cause them to stick inside the ring lands. While a good synthetic oil will keep the bottom half of the pistons in good shape, regularly supplementing a top tier fuel with a PEA based cleaner will keep those piston rings freed so they can provide pressure against cylinder walls under high cylinder pressure.

Customer Review:
The following review was sent to me by a customer after using AMSOIL P.I. for the first time after 30,000 miles of driving without any cleaners in a 1.4L Turbo Sonic. This customer used a borescope to see the pistons before and after using AMSOIL PI. Note: this engine used exclusively Shell top tier fuel and occasionally 100 octane race fuel.

"Wow! Wish i could have taken before and after pictures. The condition of the sparkplugs was unchanged. The top of the pistons however went from a uniform color of brown to a good chunk of shiny metal getting close to being brand new again. There were still areas with light carbon build up but the cleanliness was about 60% improved. Kudos PI!"
Order Information and Pricing:
AMSOIL P.I. Performance Improver Gasoline Additive

Warranty Information:
The AMSOIL warranty certificate can be found using the following URL: AMSOIL Warranty

Frequently Asked Questions:
Q: I use top tier fuels. Won't this keep my top end clean?
A: Top tier fuels reduce the amount of deposits that are produced by the fuel by keeping the fuel system cleaner. However, top tier fuels alone do not have enough detergents to eliminate these deposits. The regular use of a PEA-based top end cleaner will ensure that your fuel system, valves, combustion chamber, and pistons stay clean.
 

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Discussion Starter #3
My only question is were did all the material build up go? Valves? ports? cat? or did it get burned up?
Gets burned up and blown out of the exhaust.
 

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I should probably try this out on my wife's car. She's always stuck in traffic and I can imagine the carbon build up.
I was thinking the same thing - my wife's Solara almost never goes more than a mile from engine start to engine stop. Her fuel economy sucks but she can go over a month between fill ups.
 

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You should take those cars out on the hwy once every couple months and beat it a bit to clean out the carbon.


Sent from the sexy electrician
 

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I do try to take my wife's car out on occasion. Usually it's for her quarterly oil change and tire rotation. Her 2007 Solara has less than 33K miles on it, which means at the 30K service interval I had all the work for the 60K interval done as it had been slightly over 5 years.
 

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Discussion Starter #9
So don't use this right before you're going in for an emissions test.
Correct. It will however improve the emissions reading (in applicable states) the following tank.

You should take those cars out on the hwy once every couple months and beat it a bit to clean out the carbon.


Sent from the sexy electrician
That will help a bit if it's really bad but it isn't a preventive approach to the problem. The owner who wrote the review I posted owns a 1.4T Sonic, tuned, and drives it hard in the SW region making trips to Vegas in excess of 100F ambient at times. Cruises at 80mph, which it you've seen the area will remember consists of many significant grades for miles at a time.
 

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Discussion Starter #11
Or maybe the oil filter. I always run this stuff a couple of times before my oil change which is looking like will 11 - 12 months for me. So that way in case there is any gunk that goes to filter I am getting it out.
From the combustion chamber into the oil filter? I don't see any likely way that carbon that is burned out of the engine over the course of 400-500 miles is going to be caught shortly afterward into the oil filter. That would have to seep down past the piston rings (compression and oil seal) and contaminate the oil before finally being pumped through the filter.
 
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