I noticed that when I take my foot off the accelerator and apply the brake, the inst fuel use rises as the brake is applied, instead of dropping to 0.1 or 0.5 like it did in my TJ exec with standard auto. This could be the whole reason that my average fuel economy went from 7.5 - 8.0 in the TJ to about 10.0 when we got the 5 speed tippy. Has anyone else noticed that the transmission fights against the braking and increases fuel use?

My 5 spd tippy does the same.

I don't know why the 2 transmissions are different, but what I do is put the tippy into manual mode and downshift.
Keep the revs over 2,000 and it keeps the instant fuel economy at 0.1 the whole time. Once revs drop below a certain point, the trans seems to disengage and the engine has to provide fuel to idle.

In my car though, when I down shift it actually brakes against the engine quite effectively and if I'm slowing down early for a red light, I don't have to use the brakes at all.
I'm a little worried that I'll get 200,000kms from a set of brake pads, but half that from the transmission ! :D


Do the different trans have different lockup torque converter points or something?

Oh, the effective engine braking is because its an AWD - the power we lose in drivetrain losses also applies when you lift the throttle, which might be why AWDs get back less economy again.

The TJ used to do the same with the standard transmission, that is what stops it running on down hill when you use cruise control, stops it exceeding the speed limit, when Mitsibishi build their hybrid magna to compete with the camry they will use that energy to charge the battery pack. That's right, I forgot mitsibishi don't make real cars anymore, do they.
I just never noticed the engine working against the transmission under brakes, just seems so inefficient, not very Japanese.

I also noticed that the instant fuel goes up quiet hight 60L/100km just at the point the car stops. This is regardless of in auto or tippy mode. I dont recall fuel usage going up as the break is applied. Wll have a look on Friday.

Vlad, that high fuel consumption readout just prior to stopping is actually pretty easy to explain. Let's hope I can do it properly:

An idling engine is using fuel, let's say 1L per hour. A car that is moving very very slowly, lets say 1.66kph, is going to take 60 hours to travel 100kms, hence your fuel consumption is 60L/100km.

Once you have stopped, the time to travel 100km becomes uncalculatable (or if you're a techie/nerd, then a divide by zero error could be what happens) and the instant fuel readout goes to -- instead of a number.

HTH. Graham.

Just to point something out here with the instantaneous readout.

Its litres used per 100 kays...

If your not moving / not moving very fast, its going to take longer to travel 100kms - as idling cars have to use fuel - it still adds it to the calculation that the engine is running and the wheels are turning, thus giving you instant readout of L/100kms.

If your not moving - but have the engine running (idling at the lights / slowing for the lights) its still using fuel - but because you are slowing you will use more fuel to idle the 100kms than to cruise it. hence the apparently higher numbers there.
Just like if you floor it from dead stop at the lights (on instantaneous readout) - you get MASSIVELY high numbers - because the engine is working harder and using more fuel, it gives you like an instant average if that makes sence.

your not really using as much fuel as you think you are.

Oh - i tried the downshifting to keep revs above 2000rpm.
Doesnt seem to work in my car.......

The TJ used to do the same with the standard transmission, that is what stops it running on down hill when you use cruise control, stops it exceeding the speed limit, when Mitsibishi build their hybrid magna to compete with the camry they will use that energy to charge the battery pack. That's right, I forgot mitsibishi don't make real cars anymore, do they.I just never noticed the engine working against the transmission under brakes, just seems so inefficient, not very Japanese.

Damn, I thought an Evo was a real car... Guess I was wrong!

Have loved 3 magnas in their turn, but bought my daughter a corolla not a lancer, even so.

I never liked the look of the 380's and I think they killed the 'real' Mitsibishi family car. My 96 TE exec always appealled to me as BMW in front, Mercish behind and all affordabilty in between, from then on they had me.