Best engine tune up additives 

Tune-ups that include these items address the 6 tune issues: LtoR. Fuel Injector Cleaning, Carbon Removing, Valve Head Cleaning and Sealing, Emission System Cleaning, Sludge Removal, Surface Smoothing, Horsepower Recovery.

The best engine tune-up additives now enhance engine life!

 As most mechanics and car owners know, replacing parts can only do so much to help the performance.

   While tune-ups typically include new spark plugs, sensors, fuel injector cleaning, and filter replacement, installing these products also delivers performance gains and possible extended engine life by addressing wear and friction-related issues.

   Additive experts from Mega Power Additives have now added four more horsepower and anti-wear additives to their Fuel Injector Cleaners to correct engine issues. 

  Adding:

• Carbon Removal, 
• Valve Head Cleaning and Sealing, 
• Emission System Cleaning, 
• Sludge Removal, 
• Surface Smoothing, 
• Friction-reducing ingredients. 

By adding these 6 items, [3 into the gas tank and 3 into the oil], no technical skills needed, you can provide greater engine performance, health, longevity, and issue-avoidance benefits.

   Stops classic cases of valve tapping and slow-closing valve issues.

   Resolves common tune-up issues such as engine misfires, loss of power, and high exhaust emissions.

Here is a quick breakdown of the physics you mentioned and how treatments like Mega Power aim to help. 

Here is where only the best engine tune-up products can address engine issues.

Since the 1980s, Mega Power Additives have offered advanced engine tune-up and performance-improving additives packaged to address the whole engine cause of restoring the stoichiometry of engines.

         Getting rid of all           the tune up issues.

  Please note:

  With Mega Power's 6 products, you address high temperatures, acid formation, combustion gases, moisture, and friction avoiding engine conditions can easily reach their breaking point, that Mega Power Will avoid. What troubles are corrected?

   Reversion (Back-flow): As you noted, if the intake valve is still closing while the piston is moving up on the compression stroke, a portion of the air-fuel mixture is pushed back into the intake manifold, losing horsepower.

• Manifold Vacuum Drop: This "back-pumping" creates turbulence and pressure in the intake manifold, which lowers your vacuum readings (usually measured in inches of mercury, or inHg). A healthy engine typically sees 18–22 inHg; a drop to 13–15 inHg is a classic sign of timing or sealing issues. Mega Power restores the 18-25 in vacuum operation.

• Lower Volumetric Efficiency: Because dirty engine conditions disrupt valve seals, some of the fuel mixture escapes, and there is less "charge" power to spin the wheels. This may lead you to think the engine is showing signs of wear.  Mega Power restores sealing and the full charge to push the pistons down fully.

• Returning combustion stability: With the stoichiometric ratio return  (the ideal 14.7:1 air-to-fuel balance), the Mega Power advantage returns engine performance.