Overdrive

mini-sized SG

Can anyone enlighten me wether this is correct:

1) Off Overdrive (O/D) when travelling less than 80km/hr
2) On O/D when cruising at high speed

Does the combination of (1) and (2) would maximise fuel efficiency?
Or it better to leave it ON mode at all time??

imprezaWRXSTi22B SG

hopelessly no idea!

imprezaWRXSTi22B SG

oh yeah now i remember. there should be 1 expert here who can answer us. SeeTees, where are you??

<sk> SG

You could just leave OD on, as once the car knows that its travelling say pass 80km/hr or pass its 4th gear, it will be on OD... some cars have auto OD and some allows you to adjust for it.

I did say just leave it on OD. Wink

Theatre Of Dreams SG

just leave it on.

if over-drive is the 4th gear, then i think it is easily engaged even below 80. i've tried meddling with the button, switching off OD at speeds below 80 and the rpm rises, which means that the car already at 4th gear at such low speeds. imagine if you off it, and the car stays at 3rd throughout, of cos high fuel consumption.

mini-sized SG

Hi to all,

Thanx for replies.
For convenient sake, it's better to leave OD on mode.

But say if u r travelling in a heavy traffic, would it be ok if OFF OD since it's very unlikely that you would travel more than 80km/hr?

Qitai SG

My understanding

(1) OD ON for fuel efficiency
(2) OD OFF for power, useful when overtaking etc.

Joe_Legal SG

OD is like this sexy name given to the highest gear in an auto gearbox used for cruising
simply put, OD is like the fifth gear in a manual gearbox.
Leave it on for high speed cruising.
For high speed overtaking, turning OD off is like forcing the auto box to drop a gear, hence more power and RPM goes up.

In heavy traffic, Doesn't matter whether you leave it on or off,
coz not likely the OD gear will kick in at low speed, even if it's on.
Prob just the regular 1, 2, 3 or 4 auto gears will be used only.
IMHO, leave it on at heavy traffic. Save the hassle.

Cheers! Very Happy

Theatre Of Dreams SG

ya just kick in your right leg and let your clever transmission do the job. unless it is clever, then erm be more patient with it…

SeeTees SG

My reply are the same as the guys before me. OD is best left in its default ON position. Use it (Means OFF it) only to overtake or as engine brake. My boss loves doing it (Purposely Off the OD to engine brake his Sunny). This method confirm your car "lim you" not "seng you"... Slightly different from the 'S' mode cos it doesn't kick down to the next lower or jump to the next higher gear like the 'S' mode (if you drag long enuff that is). My boss likes to do it despite knowing that will result in hefty petrol bills becos' the Sunny is not his... My company pay for the petrol bills... Therefore, use the OD mode only if you are a few points short of redeeming your SMILE points Very Happy

BrUtUs SG

so u mean >O/D OFF< (wif the lite on) drink more fuel than the default O/D on?

SeeTees SG

Confirmed. Guarantee card + Chop + Lifetime Warranty. How can a car possibly seng you in this mode when the revs are high? Unless your car drink more in the OD On mode while overtaking then maybe I will take back the chop and tear the guarantee card.. If not, yes that will be the case as u put it. If have cars that seng you instead in this off mode let me know; I will gladly trade in my City for that car... Wink

Theatre Of Dreams SG

Laughing

free4ever SG

Just remember, O/D on (default) is the 4th gear in a 4 speed auto.

O/D off (light lighted up on your dashboard) means that you have only go up to 3rd gear.

As for rev and fuel economy, think whether you want to engage the 4th gear or 3rd gear when cruising on the expressway.

Idea Another tip to remember is that the correct mode you should be in when cruising or in any other normal situation is when the O/D light on your dashboard is off (O/D off light off = O/D on -you have up to 4th gear of the auto gearbox!!!)

As for when to use O/D off (3rd gear) is when you need power for overtaking
(think of the situation when you need to shift from 4th to 3rd gear)

Hope this clear your confusion.

Smile Smile Smile

mini-sized SG

Thank U.
Understand liao Laughing