Liqui Moly Synthoil High Tech vs Liqui Moly Molygen New Generation

Both these motor oils are fully synthetic that can be utilized in gasoline and diesel engines. Liqui Moly Synthoil High Tech pays attention to engine protection from wear and tear. On the other hand, Liquid Moly Molygen New Generation focuses on sludge cleaning.

High Tech contains good quality anti-wearing additives in enormous numbers enabling it to provide superb protection from engine wearing. The higher kinematic viscosity assists it to perform with more dominance during high-temperature conditions. Detergents are available in the oil in minimal numbers helping it to wash away sludge and other debris.

Molygen, because of its greater detergent concentrations, provides super cleaning of deposits and sludge, making it one of the best engine oils in this regard. Zinc and phosphorus are present in lower amounts that lead to more impactful catalytic converter functioning. The high viscosity index does not allow the oil to undergo any changes in its viscosity when the temperature fluctuates. The oil also provides longer durations of exchange because of very high addition of base additives.

Table of comparison

DetailsLiqui Moly Synthoil High TechLiqui Moly Molygen New Generation
Oil CategoryUtterly SyntheticUtterly Synthetic
Engine CategoryDiesel and GasolineDiesel and Gasoline
Availability of viscosity groups5W-40, 5W-30, 0W-40, 0W-3015W-40, 10W-40, 0W-20, 5W-40, 5W-30,
Price for 4 L container49.84 $38.54 $
Oil replacing distance (km)30,00040,000
SupplementsAnti-wearing agents, Viscosity modification compounds, Dispersants, Anti-oxidants, DetergentsFriction decreasing agents, Viscosity enhancer, Dispersants, Anti-wear compounds, Detergents

Contrasting the Oil Viscosity

The measure of the potential of oils to transfer momentum between the layers is called kinematic viscosity. A higher kinematic viscosity will allow better performances at much higher temperatures. The ability of an oil to cope with any changes in its kinematic viscosity when the temperature exaggerates from low to high is termed as viscosity index. A greater index of viscosity ensures lower changes in viscosity upon increasing the temperature. Pour point is considered when discussing the oil performance in chilly regions. It is a minimum temperature beneath which the fluid loses its flowing property. The motor oil having the lowest pour point temperature will be more beneficial to be used in colder regions

The working of High Tech at normal and high temperatures conditions is superior because of its greater kinematic viscosities at 100o C as well as 40o C. However, Molygen provides more resistance against variations in the viscosity upon temperature increment from normal to high.

Both oils perform identically in extreme winter conditions, as both possess similar pour point temperatures.

Contrasting oils (Grade oil 5W-40)Kinematic Viscosity during normal temperature (40 o C) (mm2/s)Kinematic Viscosity during high temperature (100 o C) (mm2/s)Index of Viscosity (VI)Pour point temperature (o C)
Liqui Moly Synthoil High Tech90.214.5167-45
Liquid Moly Molygen New Generation80.714180-45

Contrasting Interval of Oil Change

Total Base Number (TBN) is used to measure the number of alkaline additives included in motor oils. Bases are added in the oils to neutralize the acids that are formed during oil burning. The concentrations of these bases’ decreases over time. To increase the intervals of an oil change, these bases are added in larger amounts.

High Tech has lower TBN which makes the oil provide lower mileage compared to its rival oil. This oil is required to be changed after a distance of nearly 30,000 Km.

On the other hand, Molygen has comparatively higher concentrations of these additives, therefore, it gives longer durations of oil replacement. It is recommended to replace the oil after 40,000 Km.

Oils in contrast (Grade oil 5W-40)TBN mg KOH/g
Liqui Moly Synthoil High Tech9.3
Liquid Moly Molygen New Generation9.9

Working of Catalytic Converter

The reaction between ZDDP compounds and oxidized oil forms noxious ash. This ash is extremely unsafe for proper catalytic converter working. It plunges into the converter and causes its clogging.

High Tech possesses anti-wear additives in greater amounts resulting in more ash build-up. Higher amounts of ash will therefore enter into the catalytic converter, which results in its lower efficiency compared to its competitor.

The concentrations of zinc along with phosphorus additives are low in Molygen, which makes it more effective for the working of a catalytic converter.

Contrasting oils (5W-40 Grade oils)Zinc Concentration (ppm)Phosphorus Concentration (ppm)
Liqui Moly Synthoil High Tech957832
Liquid Moly Molygen New Generation877823

Contrasting Sludge Formation

The number of detergents is lower in High Tech which makes it less effective in sludge cleanups. Calcium is found in the majority as a detergent constituent. The concentration of magnesium-based compounds is also high relative to other oil. No sodium-based compounds are available in the oil; however, anti-foaming agents (silicon) are found in smaller amounts.

Molygen has a very high concentration of calcium-dependent detergents making it more effective in washing away the sludge. Magnesium is present in relatively lower quantities, meanwhile, sodium concentrations are on a higher side compared to the other oil. The quantity of silicon is similar to that of its rival providing identical performance in reducing foam problems.

Contrasting oils (5W-40 Grade oils)Concentrations of Sodium (ppm)Concentrations of Magnesium (ppm)Concentrations of Calcium (ppm)Concentrations of Silicon (ppm)
Liqui Moly Synthoil High Tech01226425
Liquid Moly Molygen New Generation61029095

Comparing oil early burning protection

The presence of lower weight molecules in higher concentrations increases oils volatility. This is due to the reason that these fine molecules will not be able to hold out against the blazing temperature of the engine, causing them to break down easily and evaporate quickly. So, the oil with lower concentrations of lightweight molecules provides better protection against rapid oil burn-off.

Both the oils provide equal protection against the pre-burning of oils. This is because of the presence of almost similar concentrations of lighter weight molecules which allow them to reach their flashpoint (combustion point) at the same temperatures.

Comparing oils (Grade oil 5W-40)Flashpoint (o C)
Liqui Moly Synthoil High Tech230
Liquid Moly Molygen New Generation230

Comparison of Engine Wear-off Protection

Anti-wear compounds are added to the oil to develop a thinner coating about the movable parts of the engine to provide better lubrication. This coating decreases the contact between these parts thereby, minimizing the problem of friction. The oil with maximum quantities of the discussed additives allows more shielding from engine wearing.

High Tech provides faintly higher shielding against these wearing problems due to its slightly greater quantities of anti-wearing additives. The concentrations of secondary additives like molybdenum and titanium are available in comparatively higher amounts in Molygen. But overall High Tech is ahead of its competitor in terms of protection against engine wear.

Contrasting oils (5W-40 Grade oils)Zinc Concentration (ppm)Phosphorus Concentration (ppm)Boron Concentration (ppm)Molybdenum Concentration (ppm)Titanium Concentration (ppm)
Liqui Moly Synthoil High Tech9578324340
Liquid Moly Molygen New Generation8778232961


  • Both the oils are entirely synthetic, used for gasoline along with diesel engines.
  • Due to Molygen lower concentrations of anti-wear compounds, its catalytic converter performance is superior to its peer.
  • Higher quantities of detergents allow Molygen to remove sludge more effectively.
  • Both the oils provide equal protection against quick oil burn-off due to similar flashpoint temperature.
  • Faintly higher concentrations of anti-wear agents give an edge to High Tech in terms of engine wearing.
  • High Tech performs more dominantly at normal and elevated temperatures.
  • Both oils provide similar cold startups.
  • Molygen because of its greater TBN allows longer oil exchange durations than its counterpart.