yes it is, unless your in the mountains, going up a steep hill, or towing.
Overdrive use depends on speed, not weather. Can you drive at overdrive speeds, use overdrive. If you can't, don't. Often it's sensible to reduce speed in poor driving conditions.
The car needs to go into overdrive unless you are towing something heavy which makes it shift between overdrive and non overdrive. It is better to allow the car to shift into overdrive.
Overdrive is the normally allowed position ( in overdrive the engine doesn't rev as high , the gas mileage is better , the transmission will run cooler etc. when you drive at higher speeds )
Yes. Overdrive is best used with longer trips at relatively constant high speed. City driving, with lots of stops, starts, and slow speeds is not what the overdrive is intended for.
Overdrive allowed is the normal position
Overdrive ON is the normal position But if you are towing something or driving in hilly country where the transmission is constantly shifting from overdrive to drive , then you want to switch the overdrive off
Overdrive is the normally allowed position , but unless the speed is higher it won't shift into overdrive anyway
In most cases drive with overdrive especially if maintaining over 45 mph. Take out of overdrive if on slippery pavement
Overdrive is a gear that was made to help conserve gas. It is best to use this gear when you are driving for long periods of time at a steady speed.
Not normally.
Overdrive is the normal position - if you are in hilly areas and find the transmission keeps shifting back and forth between overdrive and drive , you can use the overdrive cancel switch to shut off the overdrive feature and if you are towing something you also want to shut off the overdrive
On a 1999 Mercury Cougar : Overdrive is the normally allowed position ( it won't shift into overdrive until the speed is faster anyway ) If you find that the transmission is frequently shifting between overdrive and drive ( such as hilly roads ) then it is best to use the transaxle ( transmission ) control switch on the side of your gear shifter to shut off the overdrive ( O/D OFF will appear in your gauge cluster )