Long term use of fully synthetic engine oil has significant advantages in protecting and improving engine performance. The following are its five core benefits and the scientific principles behind them:

1、 Ultimate anti-wear protection, extending engine life

Molecular level lubrication: Homogeneous long-chain molecules of PAO/ester synthetic oil form a more stable oil film on metal surfaces. Experiments have shown that:

Reduce wear by 60% under boundary lubrication conditions (ASTM D4172 four ball test)

Camshaft wear rate reduced to 1/3 of mineral oil (SAE 2021-01-0478 report)

Nano anti-wear technology: Synthetic oil containing molybdenum disulfide (MoS ₂) can form a self-healing film in high-pressure areas, extending the life of key friction pairs (such as piston rings cylinder liners) by 2-3 times.

2、 High temperature does not attenuate, protecting the turbocharging system

Antioxidant capacity: The starting temperature for oxidation of synthetic oil is 40 ℃ higher than that of mineral oil (typical value 230 ℃ vs 190 ℃). Under the condition of turbocharger (local temperature ≥ 200 ℃):

80% reduction in sludge production (Sequence IIIH engine test)

The thickness of high-temperature sediment is only 1/5 of mineral oil (piston top carbon deposition comparison experiment)

Turbine protection: The evaporation loss of fully synthetic oil at 150 ℃ is less than 10% (Noak method), avoiding lubrication failure of turbine bearings due to oil carbonization.

3、 Low temperature start-up with zero wear, upgraded cold car protection

-40 ℃ flowability: 0W series synthetic oil maintains pumpability at extremely low temperatures (such as 0W-20 viscosity<6000cP at -35 ℃), while mineral oil has solidified:

Cold start instant lubrication response time is 4 times faster (ASTM D5293 test)

-When starting at 30 ℃, engine wear is reduced by 90% (Hitachi Automotive Laboratory data)

Polar adsorption technology: Ester oil molecules actively adsorb onto metal surfaces, providing protection even without establishing oil pressure.

4、 Clean performance revolution, keep the engine as new

Super clean dispersion: Synthetic oil combined with borate additives can:

Dissolve existing sludge (clean old sediment within 1000km)

Inhibit carbon deposition (reducing fuel injector carbon deposition by 75%, tested on Volkswagen TSI engine)

Acidic neutralization ability: TBN (total base number) can be maintained for a longer period of time, and can still be maintained at ≥ 5.0 after 15000km (mineral oil can be reduced to below 2.0 after 5000km).

5、 Comprehensive economy surpasses mineral oil

Comparison items

Fully synthetic engine oil

Mineral engine oil

Oil change interval 15000-20000km 5000-8000km

Fuel economy improvement of 2-5% (EPA certified) benchmark value

Overhaul mileage of 400000 to 500000 kilometers without major repairs, 200000 to 300000 kilometers requiring major repairs

Actual test case: After a certain Didi fleet switched to fully synthetic oil, the engine inspection after 200000 kilometers showed:

The clearance between the piston rings remains at the factory standard (0.15mm)

The wear of the valve rocker arm is only 1/4 of that of vehicles using mineral oil

Technological development trends

With the implementation of the National VI B/RDE emission standards, the new generation of SP/RC grade low ash synthetic oil (ash content ≤ 0.8%) has become a must-have for GPF (particulate trap) vehicle models. Synthetic oil has gradually shifted from a "high-end choice" to a "technological necessity", and its long-term value has been endorsed by global car companies (such as BMW LL-04, Mercedes Benz 229.71 certification, etc.).

Suggestion: Even for cars over 10 years old, as long as the engine operates normally, switching to synthetic oil can still significantly improve performance (high viscosity models such as 5W-40 should be prioritized). The key is to choose legitimate products that meet the manufacturer's certification standards, rather than blindly pursuing the lowest priced mineral oil.