The reason why fully synthetic engine oil has a longer service life and more stable performance lies in the triple technological breakthroughs in its molecular structure design, base oil process, and additive technology. The following is an analysis of the key technologies behind its durability:

1、 Molecular Revolution in Base Oil: From "Crude Oil Screening" to "Molecular Synthesis"

PAO (Poly alpha olefin) synthesis technology

Shear stability increased by 300% (molecular chains are less prone to breakage)

The starting temperature of oxidation is increased by 40 ℃ (typical value: PAO is 230 ℃ vs mineral oil is 190 ℃)

Artificially constructing homogenized long-chain hydrocarbon molecules (typical carbon numbers C8-C12) through ethylene polymerization reaction, compared to short chain/cyclic hydrocarbons mixed in mineral oil:

The polarity advantage of ester oil

Ester synthetic oil molecules contain polar ends and can actively adsorb metal surfaces to form nanoscale protective films, reducing metal contact wear even during cold start moments (when the oil pump has not established oil pressure).

GTL (Gas to Liquid) process

Using Fischer Tropsch synthesis to convert natural gas into Class III+base oil, with an isomerization degree of 99% and a sulfur/nitrogen content of<1ppm (mineral oil has a sulfur content of about 3000ppm), fundamentally reducing the generation of acidic substances.

2、 Synergistic efficiency enhancement of additive system

Additive type

Technological upgrades in synthetic oil

Durability impact

The consumption rate of antioxidant phenylamine complex (such as Lubrizol 9672) ZDDP is reduced by 50%

The ability of borosuccinimide (TBN ≥ 8.0), a detergent dispersant, to neutralize acidic substances is increased by three times

Viscosity index improver star shaped polymer (such as OCP with a molecular weight of 150000) has a 70% higher shear resistance than traditional linear structures

Laboratory data: In the ASTM D2893 high-temperature deposition test, the total base number (TBN) of the fully synthetic oil formula (PAO+esters+boronizing additives) remained at 5.2 after 400 hours of operation, while the mineral oil formula decreased to below 2.0 after 200 hours.

3、 Breakthrough Applications in Materials Science

Nano anti-wear technology

Tungsten disulfide (WS ₂) nanospheres with a particle size of<100nm can form a self-healing film on the surface of the friction pair, reducing the friction coefficient from 0.12 to 0.06 under boundary lubrication conditions (SAE paper, January 2358, 2019)

Intelligent release carrier

Adopting microencapsulation technology to slow-release additives (such as Runyinglian's Flex molecular cage), only releasing active ingredients when triggered by high temperature/high pressure, increasing the effective utilization rate of additives from 60% to 85%

4、 Extreme environment verification data

High temperature stability: In the continuous operation test at 150 ℃, the oxidation thickening rate of fully synthetic oil is only 0.8 cSt/100h, while mineral oil reaches 3.5 cSt/100h (ASTM D2893)

Low temperature protection: At -35 ℃, the viscosity of 0W-20 synthetic oil pump is less than 6000cP (critical value), while 5W-20 mineral oil has reached 15000cP (prone to dry start)

5、 User Value Conversion

Taking models equipped with 2.0T engines as an example:

Mineral oil: 5000km replacement, single cost ¥ 300 → 150000 km total maintenance cost ¥ 9000

Fully synthetic oil: 15000km replacement, single cost ¥ 600 → 150000 km total cost ¥ 6000

Save 20% fuel (approximately ¥ 7500)+reduce engine wear (extend overhaul cycle)

Technological development trend: With the popularization of low ash (SAPS ≤ 0.6%) synthetic oil formulations, their compatibility with GPF (gasoline particulate filter) has further enhanced their irreplaceability in modern engines. Choosing synthetic oil is not only for maintenance and upgrading, but also an inevitable choice for dealing with the new generation of power systems.