Combustion Chamber Deposits: Mechanism & Solution
Historically, leaded gasoline provided a protective layer of lead salts inside the combustion chamber, limiting carbon adhesion and preventing hard deposits from forming on pistons, cylinder heads, and exhaust valves. With the global shift to unleaded gasoline, engines now exhibit:
Accelerated carbon deposition, increased octane demand, higher risk of pre-ignition and knocking, and gradual loss of thermal and volumetric efficiency
Sam Fuel Eminil™ addresses these challenges by: Dissolving existing deposits, preventing new deposit formation through combustion modification, and restoring optimal chamber cleanliness. This enhances flame propagation and reduces the engine’s octane requirement.
The dual mechanism of Eminil™—raising fuel octane by 1–4 points and reducing engine octane demand by 2–8 points—promotes a more complete and thermally efficient burn.
As a result: Less fuel is wasted as unburned hydrocarbons, Combustion temperature and pressure profiles stabilize, Pumping losses decrease, Fuel economy increases measurably. Besides an immediate and significant reduction of emissions, independent tests consistently show immediate and sustained improvements in mileage after treatment.
Lead-Substitute Function & Valve Seat Protection
The removal of tetraethyl lead from gasoline introduced serious durability risks for older engines with soft, non-hardened valve seats. A joint USDA/EPA study confirmed:
Medium- and high-speed engines with soft valve seats will experience excessive valve-seat wear if operated on unleaded fuel. This phenomenon, known as valve seat recession, affects millions of vehicles globally—cars, tractors, boats, and stationary engines.
Eminil™ functions as an advanced lead substitute, providing: Lubricative and cushioning protection for valve seats, thermal boundary stabilization, prevention of micro-welding and seat erosion, long-term durability in older engines
This makes it a cost-effective alternative to mechanical modification or expensive leaded-fuel substitutes.
Diesel Engine Benefits
The Eminil™ technology extends effectively to diesel engines as well.
Key benefits include: Cetane number increase by up to 6 points, ensuring smoother and quicker ignition delay, rapid breakdown of carbon deposits in the combustion chamber, injectors, and piston crown, higher peak flame temperature, improving thermal efficiency, significant reduction in black smoke, unburned hydrocarbons, and NOₓ precursors, noticeable increase in torque and specific power output
These improvements enhance drivability while reducing particulate emissions common in older diesel engines.
Contact
Reach out for fuel tech support
support@eminil.com
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