facts_n_science on Instagram: "This is a demonstration of comparing different types of engine oils ranging from 0W to 50W, all poured into small glass containers simultaneously. As the oils flow, you can clearly see how their thickness or viscosity changes — thinner oils like 0W move faster, while thicker ones like 50W flow much slower. The “W” stands for “Winter”, not weight as many believe. It indicates how well the oil performs at low temperatures. For example, 0W oil stays fluid even in free