Breaking in a new vehicle is really about the engine. The break-in — or mechanical run-in — period is designed to begin to wear the engine evenly and smoothly with low, consistent pressure, normal operating temperature and smoothly flowing oil. The goal is to get the engine's piston rings, which expand, contract and flex, to seat properly on the cylinder walls. If there are imperfections in the pistons or the cylinder walls from the manufacturing process, working the engine too hard and too soon can wear down those imperfections too quickly. That leads to "hot spots" within the engine's cylinders, which can cause problems in the years to come. … [Read more...] about Do You Have to ‘Break In’ a New Car?
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Researchers also observed the quality of relationships between calves and caretakers through an avoidance distance test. The test, which measures the distance at which a calf will avoid a person who approaches it head on, revealed the stroked calves had a lower avoidance distance than the calves in the control group. In short, the calves who had been given special attention early on in their lives were less fearful and more welcoming when approached by people. … [Read more...] about Study: Cows Grow Bigger, Give More Milk After Early Positive Human Interaction