Eliminating Carbon Deposits in
Direct Injection Engines

The Issues:

Innumerable car owners continually spoke to us about:

  • Hard starts
  • Poor fuel economy
  • and always Loss of Power

Countless automotive mechanics over the years have spoken out such issues as:

  • Loss in volumetric efficiency
  • Misfire codes
  • Stumbling and suspicious fuel trim numbers

Carbon deposits on the Intake Valves

Why are there:

  • carbon deposits? 
  • accumulations of carbon?

The carbon deposits that accumulate are combustion by-products that stick to the intake-valve necks...and then harden.

This serious issue not only affects some direct-injection vehicles but, can and does appear in port fuel-injection engines.

Which vehicles may be affected by carbon accumulations?

Candidates include vehicles with:

  • Variable valve timing
  • Turbocharged direct-injection engines
  • Cylinder deactivation models.

Current Options

  • A number of chemical cleaners on the market that have been injected into intakes. Unfortunately most of their success has been very short-lived.
  • More invasive approaches are available that are expensive and require long down-times for drivers.

The Easy (for you) Alternative that

Reduces Costly Vehicle Downtime:

A Positive and Preventative Approach
from Shellbourne Fuels

Shellbourne Fuels has successfully created a fuel system cleaner that is added to a vehicles' fuel tank. Our 

High Dosage Deposit Control  Additive/Detergent/Dispersant

  • Cleans the entire fuel feed system components
  • Eliminates all accumulations resultant from engine combustion.

How is this possible?

Our cleaners are designed to match the combustion characteristics of either regular or premium fuels:

  • by introducing combustion catalysts which
  • attracts dense oxygen and hydrogen.

Result: Carbon build-up is prevented.

Cleaning while the vehicle experiences variable road conditions plus a variety of engine demands has helped.

This approach provides constant and optimal success.

The Shellbourne Fuels' commercial cleaner communicates with engine oils to reduce engine oil condensation levels and subsequently positive crankcase ventilation systems...


Maintaining injector spray patterns as well as spark plug conductivity and spacing.

Find out more:

Contact Us

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