1.   At Chrysler Corp., for example, premium fuel is recommended for maximum performance only in its Viper and Stealth cars and in one model of the Talon.

2.   Base models take unleaded regular gasoline, while the Type S requires premium fuel.

3.   But the Spyder does require premium fuel.

4.   How you get there is irrelevant, and the only real issue is economic, especially with premium fuel being pricey.

5.   In fact, regular fuel actually has more energy than premium fuel because of its burning characteristics.

6.   In general, high-performance vehicles or those with high-compression engines will be the ones that carry any recommendation for premium fuels.

7.   Lower-octane fuel burns more rapidly and actually produces more heat energy than premium fuel.

8.   Many SUVs require premium fuel.

9.   My suggestion is start running a good quality premium fuel.

10.   My suggestion is to start running a good quality premium fuel.