¿0W o 5W? El mito del aceite que mejor protege tu motor

Introduction to the debate [00:00]: The author addresses the popular belief that 0W oil provides better protection than 5W oil in urban driving because it reaches its ideal operating temperature faster, thus reducing wear. The author refutes this, stating that there is no scientific evidence to support the claim that 0W is inherently superior. The reliability of studies [02:52]: The importance of relying on real data, not assumptions, is emphasized. The author mentions that studies simulating extreme or unrealistic conditions (such as maintaining the engine at artificially fixed temperatures for hours) should be disregarded, as they do not represent real-world vehicle use. Used oil analysis (UOA) [03:07]: The experience of an expert analyst with over 10,000 used oil reports is cited. This analyst concludes that, after reviewing actual trends, it cannot be stated that a lower viscosity (0W) reduces wear compared to a higher viscosity (5W). [UOA] The Contamination and Viscosity Factor [06:52]: The video explains that wear at low temperatures depends not only on oil viscosity but also on combustion contaminants and the formation of tribofilms (protective layers), which do not act instantaneously. Case Study: Usage Comparison [08:46]: A comparison of two identical vehicles with different usage profiles is presented. The results show that, under less-than-ideal operating conditions (such as fuel dilution), higher viscosity oils offered better protection, while lower viscosity oils were more susceptible to contamination. Expert Conclusions and Closing [10:09]: The author reinforces his position by citing another expert tribologist from the US, who agrees that low viscosity oils drastically change their behavior in the presence of fuel, making higher viscosity, at times, a better ally in minimizing wear.