10 year car trade-in plan?

ok my car is exactly 10 years old now... my wife's is 2 ... its empg is 35 hwy.. its more around 29 (and yes you enviro-pinkies its a Toyota).. now my 1999 American made SUPERCHARGED Buick Regal gets 32 actual mpg .. why do i need to trade it in on a NEW car that is gonna give me 32 mpg,, i feel that by keeping it i am not using up resources to produce a new car.. thus i am CONSERVING ENERGY that you so diligently seek... so the question remains why do you wanna force me to get rid of a car that is better than what i can get now?