On the highway, yes. The engine revs lower. In town, you can use it or not. I rarely use the button. Leaving O/D on works just fine for me. You wont accelerate any faster with it on or off.
-Ken V.
1998.5 SE Praire Tan Zetec ATX
psycho_bass@hotmail.com
Roush springs Roush rear sway bar BAT struts 17" Millie Miglia HT3 and a ton of subtle asthetic mods
