Well i have an auto tranny. it seems like on my truck that the mileage does better if i go on an get up to speed 50-55 mph and then just steady it there. It seems like the slower i gain speed the worse fuel mileage. I dont know. Thanks for your input though.
ok so now ive heard TW or DP chip. Any others? and which one of these would you say is the best overall product?