4. Consider using a different oil in the winter: When winter arrives and the temperature drops, the oil in your car will become thicker. This means the engine may be harder to start, and the oil won't circulate as well during the warm-up process. To solve this wintertime problem, some engines might perform better with a thinner oil. This may be more of an issue on older vehicles, since many new cars already come with oil that's thin enough to withstand the winter. To determine the best type of oil for your car in winter, read the owner's manual. It will list the manufacturer's oil recommendations for different climates. If a dealership or local garage performs the oil change, check with the manager beforehand to make sure the desired oil type and viscosity is available.