Re: ef falcon
Driving round town, leave it in D. If you are towing, then 3rd. The overdrive puts undue stress on the tranny, unless going downhill.
the biggest issue for you is Economy or power mode. You need to do a tank of juice in each mode to ascertain which better suits your driving style, and driving area.
Personally i find Power is best for me, but that is a misnomer, as i have found for my driving style, economy changes too low in the rev range (so it labours in the next gear) and Power changes too late (so it revs like a jilted wife)
What i tend to do taking off, is leave in power mode, then when the revs are where i want them, select economy, which forces a change to the next gear instantly, then back into power until the next change.
If i am just moping about in grandpa mode, then i just leave it in D, power.
I also manually downchange for gear braking a lot....might be why i get 50k+ out of my pads
As an example. Mum and i have the same car. I get 540 to a tank, she was getting 350. She drives only in Economy. wheni was driving it,i left it in power, and was getting about 500. (mums needs plugs, leads dizzzy cap and rotor)