Thanks for getting in touch. There is a dedicated car share scheme for Warwick students called 'Take a Mate'. The scheme can help you to find other students who want to car share. The idea is that it can help the environment and save students some money! Take a look at www.warwick.ac.uk/takeamate - you can find more information, search for students who will be taking your route at the same time as you and want to car share, and register for the scheme.
You might also want to look at www.liftshare.com/content/savings_calculator.asp to work out how much you might be able to save by car sharing.