OD off all the way for "spirited" driving and OD on for cruising.

So OD off all the way when I have rapid overtaking, uphill/downhill Genting and OD on when I'm using the flatter PLUS highway.

Wikipedia is correct. OD on gives a "virtual" 4th gear to the 3-speeder while OD off lets it off at 3rd gear, the highest.

Example, for a 4-speed auto (the fourth being the overdrive)
For cases of "OD on", the transmission shifts up and down freely from 1st-2nd-3rd-4th, back and forth, etc.
For cases of "OD off", the transmission shifts up and down freely from 1st-2nd-3rd, back and forth, etc, the highest is 3rd.

Just my 2 cents.

This post has been edited by darahhitam: May 7 2007, 04:02 PM