Some vehicles use a timing chain to regulate the combustion process rather than a cambelt. This looks like a metal bicycle chain and requires lubricant to work. It is much more durable than a timing belt, lasting more than 200,000 miles if looked after well. However, you should book regular oil and filter changes and a timing chain service after 125,000 miles to keep it in good condition.
You can consult your vehicle handbook to find out whether your vehicle uses a timing chain or timing belt. Failing that, you can check your engine bay for a plastic cover on the right- or left-hand side of your engine. If you see this plastic cover, your car uses a timing belt. If not, it uses a timing chain.