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Q whats sae oil
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MaxPeg Release Time: April 22, 2024, 4:42 AM
In terms of motor oils, their thickness or viscosity is a crucial factor in performance, delineated by the SAE (Society of Automotive Engineers) grading system. Among common motor oils, the “W” in the grading system stands for winter, indicating the oil’s viscosity at cold temperatures, followed by a number rating its viscosity at 100°C. The higher the number, the thicker the oil. For example, SAE 50 is thicker than SAE 30 at operating temperatures. However, oils designed for extreme conditions or heavy-duty applications can be even thicker. For non-conventional purposes, products like gear oil, designated with grades like SAE 140, are much thicker than typical engine oils. For most automotive engines, viscosity grades like 5W-30 or 10W-40 are standard, balancing cold-start fluidity with sufficient thickness at operating temperature for proper engine lubrication. In summary, while SAE 50 might be among the thickest standard motor oils, specialized or non-engine oils l...
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Q what is polyester
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MelissaJeremy Release Time: April 19, 2024, 4:19 PM
Shrinking polyester is challenging due to its synthetic nature, designed to resist shrinkage. However, it can be done using high heat. Start by washing the garment in hot water, then dry it on a high heat setting. The heat from the washer and dryer can slightly reduce the size of the polyester fabric. Be cautious, as excessive heat can damage the fabric or alter its appearance. If you’re looking for a more significant size reduction, consider taking the item to a professional tailor. Remember, results can vary based on the polyester blend and the garment’s construction.
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