The easiest way to explain one of the biggest differences between the oil types is with an extreme example. In the photo on the left we have both new and used conventional and synthetic oil. All 4 samples were chilled to negative -35°F and then poured out over an engine block made of the same materials found commonly in automobile engines. The results speak for themselves. The conventional oil just doesn’t compare in colder temperatures. There are also many other benefits, check out the clickable sections below to learn more.