Gasoline Fuel-Additive Breakdown

Amsoil gasoline additives work and Amsoil has the data to prove it.

Performance Improver (PI)

Over time, deposits form on your engine’s fuel injectors, on your valves and in the combustion chamber.AMSOIL PI Injectors are highly engineered to tight tolerances, and even minute deposits interfere with the spray pattern. This interference reduces power, fuel economy, and fouling which can lead to engine wear.

This problem is pronounced in gasoline direct-injection (GDI) engines with injectors located in the combustion chamber exposed to extreme heat. Direct injection typically creates 30 to 40 times more soot than port-fuel injectors (PFI).

You will notice a reduction in:

  • Power
  • Throttle response
  • Fuel economy
  • Drivability

Amsoil P.I. can change that, P.I. contains concentrated detergent that aggressively cleans stubborn deposits from injectors, valves and combustion chamber – restoring up to 14% horsepower. P.I. restores GDI fuel injectors to a 100% flow rate after one tank of fuel. P.I. is a low-cost and effective option.

Upper Cylinder Lubricant

Your engine’s top end is sparsely lubricated and prone to the developments of deposits. The intense heat of combustion and limitations of the oil-control piston ring result in a lack of oil at the top of each cylinder. This leads to ring and cylinder wear that reduces engine combustion, decreasing power and performance. The top end is highly susceptible to corrosion due to ethanol in the fuel. Ethanol has the propensity to attract water.

Benefits of Upper Cylinder Lubricants

Amsoil Upper Cylinder Lubricants delivers 18% more lubricity than Lucas and 20% more than Sea Foam. This translates to better retention of horsepower and fuel economy.

Other benefits include:

  • Fights ethanol related corrosion
  • Uses potent corrosion inhibitors to coat metal surfaces
  • Blocks out moisture
  • Stops deterioration before it happens

Gasoline Stabilizer

Gasoline can break down in as little as 30 days. Gum and varnish become more concentrated and less soluble as lighter hydrocarbons evaporate. Gasoline is continuingly oxidizing, which adds varnish and other deposits to the mixture. This fouls the fuel system and prevents gasoline from flowing into the combustion chamber.

In severe cases, gasoline can change so much that it won’t ignite. Ethanol added to gasoline at the refinery can absorb water from the air, which can lead to phase separation in which gasoline and ethanol separate into layers. Ethanol that has absorb moisture can foul the fuel system and prevent the engine from starting.

It’s vital to stabilize fuel prior to storage. Adding Amsoil fuel stabilizer is a simple and inexpensive way to head off more serious downtime and repairs down the road.

Benefits of Amsoil Gasoline Stabilizer:

  • Improves gasoline stability up to 12 months
  • Protects against corrosion


If you put equipment in storage for several months with out a fuel stabilizer, it’ll be a challenge to start when you bring it out of storage. Quickshot can help with that.


  • Cleans varnish, gum and insoluble debris that clog carburetors, fuel injectors and fuel filters in powersports equipment and small engines.
  • Quickly detaches and carries away fuel-system deposits, while also cleaning hard-to-remove deposits on piston tops, spark plugs and other combustion-chamber parts.
  • Helps reduce pre-ignition, rough idling and poor throttle response, restoring peak performance.


  • Designed to keep water due to ethanol dispersed in tiny molecules throughout the fuel tank, moving it out as a normal part of operation.
  • Helps maintain engine performance and protects against damaging corrosion.
  • Decreases the chance of ethanol separating from the gasoline, helping prevent lean-burn and combustion-chamber damage.

Diesel Fuel Additives

Amsoil also has a complete line of diesel fuel additives. For peak performance, diesels need a daily dose of detergents for cleaning and protecting the injectors and fuel pump while keeping the combustion chamber clean.

Amsoil Diesel Injector Clean – Has unique chemistry to target and eliminate specific performance issues to maximize diesel power. It cleans dirty injectors to restore power, torque and reduce smoke and emissions. It lubricates pumps and injectors, reducing wear, downtime and maintenance costs.

Amsoil Diesel Cold Flow – Combats diesel-fuel gelling by improving diesel cold-flow ability. It is formulated with an advance de-icer to enhance fuel flow and help prevent fuel-filter plugging in cold temperatures.

Amsoil Diesel Cetane Boost – Raises the cetane number of diesel fuel up to eight points for maximum horsepower, increase fuel economy and easier starts in diesel engines.

Amsoil Diesel Injector Clean + Cetane Boost – Combines the superior detergency and improve lubricity Of Amsoil Diesel Injector Clean and increase horsepower and cetane of Amsoil Cetane Boost.

Amsoil Diesel All-in-One puts the benefits of  the following into one convenient package:

  • Diesel Injector Clean
  • Diesel Cetane Boost
  • Diesel Cold Flow

. Diesel-All-in-One delivers:

  • Outstanding detergency
  • Improve lubricity
  • Higher cetane
  • Prevents fuel gelling in cold weather