1 (12 ounce) can of lemon-lime soda pop (not diet)
1/4 cup vegetable oil
Mix all ingredients together in a Ziploc bag. Add 6 chicken breasts and marinate for at least 30 minutes (although the longer you go, the better they taste! I usually marinate my chicken for at least 8 hours or overnight).
Grill over medium-high heat until cooked all the way through.