[ENTENDA] QUAL ÓLEO USAR NA HARLEY - Fim da Polêmica – Teste completo

Which oil should I use in my motorcycle? Synthetic, semi-synthetic, mineral. Do these oils make a difference when using them? Is it enough to just follow the oil's viscosity? How many quality classifications do motorcycle oils on the market have? These and other questions will be answered in this video. CLASSIFICATION OF BASES: Synthetic: Made in a laboratory, it does not use mineral oil in its composition. Mineral: Comes from petroleum distillation. Semi-synthetic: It is a mixture of oils, but it doesn't have to be half and half; it can have a much higher mineral base to be called that. VISCOSITY CLASSIFICATION: We have a number with a letter and a set of numbers: Example 20w50 In this case, it means that the oil has a cold viscosity of 20W and a hot viscosity, the motorcycle's operating temperature, of 50. (There is a table of this on the internet: https://www.lubmix.com.br/tabela_visc...) The lower the number, the more fluid the oil. There is no better or worse viscosity, there is only the correct one. The cold classification means the oil with the engine off and at rest. Viscosity temperatures change little with ambient temperature. Only extremely high or extremely low temperatures would make a difference. A country being slightly colder or slightly warmer does not influence the use recommended by the manual in relation to viscosity. API CLASSIFICATION: This classification determines the technological level of the oil, "S" will always indicate that it is for an engine that uses a spark plug, and the following letter is the technological level. The further down the alphabet, the more technologically advanced the oil. JASO Classification: This relates to specific additives for use in transmissions and clutches. MA2 is the most common for use in motorcycles. CAUSES OF OIL DEGRADATION: Accumulation of particles and impurities in the engine oil itself. Fuel, which also passes into the crankcase and contributes to oil degradation. TEMPERATURE: one of the biggest causes of degradation. In the case of a Harley, operating temperatures are between 180 and 230 degrees Celsius. Oxidation: occurs with temperature and over time. THE TEST: Due to a lack of high-standard equipment, we performed the frying pan test. We considered the operating temperature of a Harley Softail to be 180º and a peak of 230º. High-quality mineral oil began to evaporate at 80º and showed significant oxidation at 230º for about 5 minutes after being maintained at that temperature. Semi-synthetic oil was different; it took a little longer to show oxidation, but it also oxidized on a large scale, showing evaporation at 130º. Synthetic oil, up to 260º during the test period, did not show any signs of oxidation. Furthermore, it only began to evaporate at almost 200º. CONCLUSION: In a Harley Softail, it is not possible to use mineral or semi-synthetic base oil without compromising engine durability. In the primary, it is impossible to use mineral oil, since the primary operating temperature is 140º, and we have shown the evaporation temperature of a mineral oil. TIPS: Don't skimp on oil; if the manufacturer recommends synthetic base oil, use it because there are strong reasons. The cost of changing quality synthetic and semi-synthetic oils is practically the same; just do the math on the quality oils. Be very careful with API SM semi-synthetic oils – they are even worse than the semi-synthetic oil in the test. AVOID HARLEY PROBLEMS Using oil that does not meet specifications can cause premature engine wear, premature stator wear, and can raise the oil temperature beyond 230º, in addition to forcing CAN SERVICE to be done before the correct time. Remember, this video and test aim to demonstrate to motorcyclists, and laypeople like us, that the use of semi-synthetic or mineral oil is completely wrong from a technical point of view. In the engineering field, in the technical environment, this discussion doesn't exist; it's only possible among laypeople because those who watch this type of content lack the necessary knowledge to understand how it works, which is what we're trying to change with this video. ABOUT FILTERS: Oil filters are very important for removing impurities caused by engine friction. Cheaper filters (even those currently available on the market) don't meet the safety valve specification. Therefore, the oil continues to pass through the filter, but without being filtered; this is equivalent to eliminating the filter altogether. This causes absurd premature engine wear. This economy would be even more absurd to achieve than the economy with the type of oil used. Supporting Material: https://chiptronic.com.br/blog/saiba-.... https://unisanta.br/arquivos/mestrado... https://rep...