3 Tips to save money on a new car

Car dealers don't just sell cars they will push any related product that has juicy commision. Accesoiries, insurance or extended warranties are just some examples. Often thses product can be had from an idependant party at a serious discount.
Get insurance direct
Whatever you do don't buy your car insurance through the dealers. Dealers will do anything to sell you coverage, but they are highly overpriced. When they're folded into your car loan you will also pay interest on it! Stick to regular life and disability insurance through an individual policy.

Buy extended warranty independently
Be extremely wary of purchasing service contracts or extended warranties on new automobiles through your dealer. Many of them have very limited coverage (in spite of what the salesman may lead you to believe) and they cost much more than policies purchased directly from providers like *affiliate*.

Do your own small maintenance jobs
Change the oil and oil filter in your car every 3,000 miles, regardless of how often your owner's manual recommends. More frequent oil changes are the single most important factor in extending the life of your engine, and will more than pay for themselves in savings on repairs and engine wear.

source: http://financialplan.about.com/cs/cars/a/101Car_2.htm