Auto Tranny or Sport Shift

[gogeta2006]

Hello Fellas,

Hope everyone is in good spirits.
Just viewed the post of our fellow man who got his window smashed
*sigh*

I have a 2008.5 GT Sport M3 and i was wondering does using the sport shift instead of auto tranny creates any difference in fuel consumption? Or is using the sport shift better?

I always notice that the auto tranny always shifts near 2K RPM (being light-footed on gas pedal). Not to say, i have any problem with that but is it better to shift near 2500 RPM in sport mode or less? or is the auto tranny just trying to lessen the load/pressure on the engine?

Another question is:
I bought new toyota sienna xle fully loaded in 1999 and i still have it.
So in 10 yrs its mileage is 240,000 KM. (and still running great)
I had NO Engine problems, noise, or anything like that.
Thank God, no accidents, no bumps just some sad saps thats left their mark with scratches.
The only work was done oil change, tires, and recently a $3,000 maintenance that placed brand new drums, suspension, and stuff like that (after 9 yrs- those things were worn out)

Still running good - no engine noise. no probs.

-----------
Now i have the mazda 08.5 GT.
So do you think the car will last that long or pose any problems being a very light-footed driver (in regards to gas pedal)?



Thanks for all your input.
Really appreciate it!

Regards,
Mani

[Sean Newman]

I am wondering the same thing...if you keep bumping the upshift on the auto, why would you get worse fuel economy than the manual if they are both five speed?

[3GFX]

Yes it can yield better milage, but wear and tear. There's a thread on this (MGM?).

I find the sport mode to be better for not only spirited driving but fuel consumption as well. It allows you not only to engine brake, but also to select a higher gear than if the computer were deciding. Either way if you're light on the pedal the car will return good milage. Keep in mind the engine and tranny are adaptive to driving style so if you always drive conservative the car will return milage of that nature. Where as if you drive different all the time, well the sport shift allows you to adjust the style how you like.

[Cardinal Fang]

If you allow the car to rev higher before your gear change you will waste more fuel. Driving the car in auto mode allows the computer to select the gear changes at the optimum points for fuel consumption. When I drive the car using the sport shift I find I allow the car to rev just a little longer before changing gears. The causes my fuel consumption to go down. Now, if I decided to drive the car in the sport shift mode to maximize fuel consumption I'd be driving it like it was in auto. Which to me is boring.

I like the sport shift mode for "spirited" drives as 3GFX mentioned. When you're in that frame of mind don't expect good mileage.

[Olestra]

The way you drive your cars, your cars will last very long.

[mit-gee-mui]

Yes it can yield better milage, but wear and tear. There's a thread on this (MGM?).

I find the sport mode to be better for not only spirited driving but fuel consumption as well. It allows you not only to engine brake, but also to select a higher gear than if the computer were deciding. Either way if you're light on the pedal the car will return good milage. Keep in mind the engine and tranny are adaptive to driving style so if you always drive conservative the car will return milage of that nature. Where as if you drive different all the time, well the sport shift allows you to adjust the style how you like.

http://www.torontomazda3.ca/forum/showthread.php?t=7737&highlight=sport+mode+mileage
especially post 4???

http://www.torontomazda3.ca/forum/showthread.php?t=11983&highlight=sport+mode
How about this one?

http://www.torontomazda3.ca/forum/showthread.php?t=11300&highlight=sport+mode
Or this?

[x_o_k_x]

drive with cruise control I get 7.5l/100km in another words I drove 400km with half a tank to go. Just my experiment...

[3GFX]

Its more efficient to not use cruise control you just really have to pay attention. Cruise control just limits your speed. You have to figure that under a hilly terrain the car still works to maintain the speed and may even shift down a gear where as you can slow down on the hill, keep a gear, or even prepare by speeding up on the leading downhill. Better milage can be achieved off of cruise control. You just have to work harder.

But I digress, this isn't about cruise control, its about the tranny.

[x_o_k_x]

yeah exactly cruise control limits the speed, but it also controls fuel effeciancy on up hills and down hills by letting off gas pedal. In overall it will average out your average fuel consumption. And yeah I press cancel and let the pedal go on down hills and then resume again.. Anyways works for me, and im looking to get 750km+ on full tank