Is vegetable oil chemically similar to the used in car?

Yes, vegetable oil and the oil used in cars are both chemically similar. Both vegetable oils and car engine oils are composed of triglycerides, which are molecules made up of three fatty acids attached to a glycerol molecule. The difference between vegetable oils and car engine oils lies in the types of fatty acids present. Vegetable oils typically contain unsaturated fatty acids, such as oleic acid and linoleic acid, while car engine oils contain saturated fatty acids, such as stearic acid and palmitic acid. Additionally, vegetable oils have lower viscosities than car engine oils, meaning that they flow more easily.