Overdrive

[Suetheramble]

I have found a button on my automatic lever when pressed O/D off appears on my dashboard. It has always been off as I didn't know it was there but was wondering when I should use it?

[SlackAlice]

You mean it has always been 'on' because you had no notification that it was 'off'!

Make, model, year of car?

[Suetheramble]

I assume the overdrive is on continuously. What is an overdrive for and when should I use it....or turn it off please?

[TonyV]

Need details of your car manufacturer model and year.

[ladybirder]

I use mine when I am on a reasonably long stretch of road where I probably won't have to change gear for a while and am doing at the very least 40 mph. Definitely use on a motorway. It saves petrol Sue.

[TonyV]

Ok Sue without car details, just some general advice. Overdrive is basically another gear, use it whenerv

[TonyV]

To finish use it whenever you can, reduces engine revs and gives you better mpg.

[Suetheramble]

Many thanks of your answers I will follow ladybirds suggestion.

[bhg481]

I must say I've never come across an automatic with overdrive. What car is it, please?