(MONEY Magazine) – More flexible-fueled cars are coming out. Is one the answer to your soaring gas bills? Let the numbers be your guide.

47% of car shoppers believe they would save by driving an ethanol-fueled car and...

$2.43 is the recent national average for a gallon of ethanol (E85). That's less than regular gas. But...

15% is how much lower your gas mileage can be with ethanol, so...

8% is how much more you'll typically spend on fuel with an ethanol-powered car.

NOTES: Based on 2006 models. SOURCES: Autobytel,U.S. Department of Energy, Fueleconomy.gov, National Ethanol Vehicle Coalition.

Moneymatics UP? DOWN? WE DO THE MATH.

Equity-indexed annuities. The term may make your eyes glaze over, but insurance agents are pushing them, claiming they're better than regular fund portfolios. Are they? A simple analysis.

Annuity = Higher fees and expenses + Big penalties for early withdrawal + Ph.D. in math needed to calculate value

Well-balanced fund portfolio = Modest operating costs + Transparent pricing + Safety in diversification

BOTTOM LINE Forget the annuities. For more in-depth analysis, turn to page 106.

...Rank yourself: Enter your salary at GlobalRichList.com. If you make $100,000, say, you're the 39,615,049th-richest person in the world...