According to MSNBC, the new deals that some automakers are now offering to give customers lower prices on gas may not be as sweet as they seem.  Even though gas prices keep climbing without showing any signs of slowing down anytime soon, the discounted gas prices that auto makers are offering with the purchase of new vehicles may not be the best way to save money.  These offers are limited, often to a certain amount of gallons per year and only on certain models, and they are often not as good as other deals that may be available.  For example, many automakers offer 0% financing on new vehicles instead of the gimmicky gas scheme.   Interest on a car loan can cost $50 or more per month depending on your loan terms.  And many automakers will offer other rebates and other incentives equaling thousands of dollars.  That could buy you a lot of gas.  So when you go to buy a new car and are comparing deals, make sure you do the math and choose which deal is best for you.