Semi Trucks - MFA Oil Boss Diesel


The extremely high pressure and temperature environment of modern engines thermally stresses the fuel and causes it to break down, or coke, in the upper cylinder of the injector. This leads to deposits on the armature plate, injector nozzle and push rod. These deposits are referred to as Internal Diesel Injector Deposits (IDID) and can be waxy/soapy or carbonaceous in nature. The internal injector components run at such tight tolerances that even a small, thin deposit or film can cause sticking and interrupt fuel flow to the cylinder. This results in a rough running engine, which causes diminished power and fuel economy. 

BOSS Performance DieselTM can do what conventional detergents of the past cannot – offer an aggressive combination of detergents to clean up and prevent the IDID deposits in modern Tier III through final Tier IV engines. The new detergents also are extremely successful in deposit cleanup and keep-clean in pre-Tier engines.

Fuel Injector Push Rod

Baseline #2 Diesel Fuel

BOSS Performance Diesel

Types of IDID Deposits

Deposit Description  

Type I

Metal Carboxylates

  • White, soapy deposits, but not alone
  • Occur with Type II deposits, but not alone
Metal Carboxylates

Type II

Carbonaceous Black Deposits

  • Caused by HPCR degrading fuel (dehydrogenation)
  • Most Common type of deposit
  • Can occur alone or with Type I deposits
Carbonaceous Black Deposits

Type III

Amide-lacquering Type Deposits

  • Less Common in US
  • Reported more in EU and elsewhere
Amide-lacquering Type Deposits