Q. OverDrive ON / OverDrive Off

[dr. d]

Guys,

I just read from an article "Car from Japan". It's about The Effective Ways To Use The Overdrive In Automatic Car.

In one paragraph it says and I quote:

"When you’re speeding up

It’s the textbook condition for using the overdrive in automatic car. When you drive at more than 60mph (50mph in case of older vehicles), the RPM increases and the engine starts taking more and more strain. Turning on the OD will work like magic to take the pressure away from the engine and bring down the RPM.

However, don’t use it when you are speeding at less than 50mph or during city driving because the speed tends to be inconsistent there. The OD prolongs the life of your car’s engine and drivetrain only if you apply it wisely."

50mph is around 80kph. So it says that driving below 80kph, OD should be switched off?

Please share your precious thoughts.

NOTE: Repost ko ito since I posted on the wrong thread kanina.

i just use regular AT setting, and let it do the thinking for me.
ordinary driver, here.