i have a 2003 super cab xlt. i usually turn the overdrive when driving around town and turn it on when i get on the highway (over 55). Does anybody think i will get better gas mileage this way or should i not even bother and just leave the overdrive on all the time?

 

leave overdrive on all the time

 

over drive is a killer on a auto trans in the city unless driveing over 50 all the time keep it off unless on interstate are something in that matter

 

i was always told to leave it on..then again most roads around me have a 40 mph limit

 

Leave it on

And what exactly is you're reasoning for saying this?

 

also runnin with od off is putting unecessary wear on your drivetrain because the rpms are higher and higher rpms=more wear

 

X2 the only time i turn mine off is when im towing. no reason to shut it off otherwise.

 

I was always told if you live or drive in a hilly area to leave it off until you get back to flat ground

Otherwise on.

 

Always on unless putting the truck underload.

Any load. Hills. Towing. Extra weight in the bed. Off-roading. Snow. Mud. Anything besides normal driving.