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00:00:00 – 00:21:09
The video explores viscosity breakdown in lubricants and its impact on engine wear, emphasizing the role of viscosity index improvers in preventing breakdown. It discusses testing different oil blends in a lab setting to showcase the effects on performance. Various tests like KRL and HTHS are conducted to assess viscosity and shear stability in oils. The importance of selecting the right base oils and additives to tailor oils for specific applications is highlighted. The video also touches on the significance of shear stability, mentioning the differences between various polymers. Overall, the content delves into the science behind motor oil viscosity and offers insights to prevent engine failures.
00:00:00
In this segment of the video, the speaker discusses viscosity breakdown and its importance in lubricants. They explain how viscosity breakdown can lead to high wear in engines due to low viscosity. The video features testing at a lab to demonstrate the effects of oils with and without viscosity index improvers, which play a key role in preventing viscosity breakdown. The lab creates oil blends with different base oils and viscosity index improvers to showcase the impact on cold temperature performance. The upcoming content promises in-depth exploration of motor oil viscosity, including insightful scientific information.
00:03:00
In this segment of the video, the discussion centers on comparing viscosity between Group 3 and Group 4 oils using 8 base oils made into 30 weights with viscosity index improvers. The focus is on achieving a viscosity of 10.5 C at 100°C within the SAE 30 grade range. The conversation delves into the concept of Cokes as a flow measurement and the role of mechanical shearing, mentioning Porsche engines as an example. The mechanical shearing impact is simulated using a KRL test in the lab, forcing the oil to be sheared, thus affecting viscosity breakdown. The KRL test method is explained as a favorite test for understanding viscosity breakdown due to mechanical shearing.
00:06:00
In this part of the video, the speaker discusses measuring the viscosity of oils by running the KAC viscosity test for flow at KV 40 and 100, along with cold crank simulation to determine summer and winter numbers. High temperature high shear (HTHS) testing is also conducted to stress the oil and stretch polymers temporarily. The comparison is made between HTHS and KL tests using a rubber band analogy. The importance of these tests is highlighted to prevent engine failures, as even race engines or passenger car engines can be affected. The speaker then talks about test results for 5W50 and 0W40 Mobile 1 oils, which are within the expected range, suggesting further testing with KRL for viscosity breakdown.
00:09:00
In this segment of the video, the speaker discusses the properties of Pao8, an 8 Ceno group base oil blended with a styrene-based VI improver known for its shear stability. They experimented with various blends, including different base oils, OCP, and PIB additives. The speaker highlights the significant differences in cold crank properties of the synthetics and improvers, emphasizing the need to tailor oils for diverse applications. The testing process is demonstrated, showing the load application for assessing shear stability.
00:12:00
In this part of the video, the speaker mentions noticing a change in the API rating on a bottle of Mobile One oil. They discuss conducting KRL Shear testing and plan to run the oil on a kinematic viscometer to measure viscosity changes post-test. The video will include results from testing various commercial oils and bespoke blends with different polymers and base stocks. The speaker highlights the use of different viscosity index improvers such as O copolymer, PIB polyiso, and star polymers for comparison. The goal is to target SAE 5W30 specifications for the lab blends.
00:15:00
In this segment of the video, it is discussed how group three samples failed to meet the 5w grade, mainly due to low temperature performance issues compared to star polymers like PIB. Even though PIB excelled in shear stability, it lacked in low temperature performance. Star polymers were praised for balancing shear stability and low-temperature performance effectively. The KRL results correlate with real-world field data, showing oil samples losing viscosity grade due to shear instability. The hths results at 150°C are crucial as they reflect actual engine conditions, with oils like 10w60 experiencing significant viscosity loss, indicating poor performance.
00:18:00
In this segment of the video, the speaker discusses viscosity changes in oils due to dispersant additives and polymers, highlighting the importance of shear stability. They mention using a 5W30 oil in place of a 0W40 due to shearing concerns. Lab results show that lubrizol star polymer is more shear stable than Infinium star polymer used in some products. Using more shear-stable polymers provides better high temperature and high shear protection. Trusting lab results over labels or spec sheets is emphasized.
00:21:00
In this part of the video, the speaker advises viewers to subscribe for more content. They wrap up the segment with acknowledgments and background music.