• ​Deposit control additives
  • Octane number improver
  • Corrosion inhibitor
  • Demulsifier
  • Synthetic carrier oil
  • Lubricity improver
  • Antioxidant
  • Antistatic agent
  • Marker


What is DCA

DCA (Deposit Control Additives) is a surfactant, which consists of a polar “head” and an oil-soluble “tail”.

Some pre-depositions are captured in oil by DCA molecules so that scaling is decreased or eliminated.

DCA should be no ash, not containing any metal components.

Reasons for having DCA in Bereichen Additives

Solve the problems of nozzle carbon deposition, intake valve deposits, intake valve sticking and combustion chamber deposits.

  • Reduce octane requirement
  • Improve fuel economy
  • Reduce emission

Type of deposits

  • Internal diesel injector deposit, IDID
    The main deposit position is in the valve, piston and valve needle, which mainly cause engine jitter, poor running and can not start etc.
  • External nozzle hole deposit
    The main deposit position is inside and around the nozzle hole, which mainly causes the decline of power. CEC F-98-08 test standard should be designed for this problem.

History of DCA


  • The additive was used to solve the problem of oil gumming.
  • The technology was very simple.
  • Commonly used alkylamine phosphate until the invention of the catalytic converter.
  • Fatty acid amide began to use.
  • Low concentration
  • This is often referred to as the first generation DCA.


  • Nozzle fouling often occurred in the United States.
  • In order to control fouling, increased the concentration of carburetor detergents.
  • Led to the increase of intake valve deposits.
  • BMW company reported the problem of intake valve deposits.


  • In middle1980s, market gradually believed that using DCA has a practical effect on improving vehicle performance and reducing emissions.
  • From 1992 all California gasoline must contain DCA.
  • From 1995 all US gasoline must contain DCA.

DCA Testing Methods

Method (Top Tier Program) one

  • Intake valve deposits:
    Intake valve deposits (IVD) is measured based on ASTM D 6201. Standard Test Method for Dynamometer Evaluation of Unleaded Spark-ignition Engine Fuel for Intake Valve Deposit Formation.
  • Combustion chamber deposits:
    Measured based on ASTM D6201 (Combustion chamber deposits (CCD) shall be collected and weighed along with IVD using ASTM D6201, Standard Test Method for Dynamometer Evaluation of Unleaded Spark-Ignition Engine Fuel for Intake Valve Deposit Formation). It can collect and weigh CCD, but the ASTM D6201 does not indicate how to collect and measure the CCD. CARB recommends a program (scraping and weighing) to collect and weigh CCD (measurement methods on March 12, 1999).

Method (Top Tier Program) two

  • Fuel injector fouling test:
    GE company’s Fuel injector fouling shall be measured using the TOP TIER fuel injector fouling vehicle test.
  • Inlet valve adhesion test:
    Using 1.9 L Volkswagen engine (CEC F-16-T-96) or 5.0 L 1990-95 General Motors V-8 engine (SWRI IVS test).

The two methods can be used to evaluate the tendency of the gas inlet valve adhesion.

Standard Method

Test Method for Evaluating Gasoline Detergent Produced Effect for Electronic Port Fuel Injector (PFI) Fouling (ASTM D6421)

Test method for influence of induction system deposit (ISD) tendencies of gasoline detergent(FTM No.791C 500.1)

Engine Dynamometer Test Method for influence of intake Valve and Combustion Chamber Deposit Tendencies of Gasoline Detergent (Ford 2. 3 L Method) (revised based on ASTM D6201-1999 )

Engine Dynamometer Test Method for influence of intake Valve and Combustion Chamber Deposit Tendencies of Gasoline Detergent(M111 Method )(revised based on CEC F-20-A-98)


What is Octane Booster

Octane number is an important indicator of gasoline. It examines the anti-knock ability of gasoline.  In general, the car of higher compression ratio needs a higher octane number. The octane number needs of the old car are higher than the new one. (Because the internal carbon deposition of the engine increases the actual compression ratio.)

When octane number is insufficient for old engine, there will be engine knocking, it may cause damage to the engine. Modern engines generally avoid these destructive effects by automatically adjusting the ignition delay, but it also makes power and fuel economy down.

Bereichen provides optimum solutions

Bereichen can solve this problem through two ways.

  • Maintains the actual compression ratio by reducing internal carbon deposition to reduce the demand for octane number.
  • Raises the gasoline octane number by adding the gasoline octane booster.

Through these two ways, Bereichen can achieve a more smooth and complete combustion.  Gasoline energy can be released more efficiently, engine performance can be improved, fuel economy can be improved, and gas emission can be reduced.


What is Corrosion Inhibitor

It is difficult to completely remove water in oil system (such as oil tank, oil pipe).
Corrosion inhibitor can prevent or reduce the corrosion of the entire combustion system by forming a dense protective film on the inner surface of the system to separate water from the metal surface.

Bereichen provides optimum solutions

Adding Bereichen gasoline additives that contain corrosion inhibitor can prolong the service life of the engine.


Reasons for having Demulsifier in Bereichen Additives

  • Improve the separation performance between water and oil, avoid oil and water emulsion
  • Reduce corrosion
  • Reduce emissions


What is Lubricity Improver

Lubricity improver can form a protective layer on the wall of the cylinder, thereby helping to reduce the friction between the piston ring and the cylinder wall.

Bereichen provides optimum solutions
Having this special component in Bereichen helps to improve the power output, the fuel economy and the performance of the engine.


Reasons for having Antistatic Agent in Bereichen Additives

According to the requirements of the national mandatory standard GB6950, in order to ensure the safety of fuel using and transportation, avoid catastrophic accidents due to static electricity, the electrical conductivity of light oil shall not be less than 50pS/m.

With the strict requirements of environmental protection, gasoline and diesel are required to have low sulfur content.

During the hydrogenation and desulfurization processes, the natural antistatic agent is being removed from the fuel resulting in the reduction of fuel conductivity.

Adding antistatic agent is the only effective way to improve the conductivity of oil.


What is Marker

Marker is an additive which is difficult to be observed by the naked eye but can be detected by the instrument. It helps to ensure the fuel quality, avoid irregular oil being transferred to the regular service depot.

Marker for Bereichen Packages can be added optionally.