I'm looking to regain a little fuel and engine performance w/ my 2000 Dodge Dakota V6. It has only 25,000 miles on it, but the engine seems a little lethargic at times, and the gas mileage seems as if it's taken a nose dive lately. Has anyone had any positive experiences w/ those fuel injector cleaning additives that you put in the gas tank? If so, what do you recommend? ...Actually, I'd appreciate any unrelated suggestions as well. I'd appreciate your help. Thanks.