What's your best speed for economy in your new 2.4 5 Speed Manual shift Tranny?

[MountainMax]

I was wondering if any of you guys found the sweet spot for highway cruising speeds in your new 2.4 stick shifts? I averaged 29mpg at 100km/h and was curious if i went a little slower would it get any better like the 39mpg the window sticker stated? I find the engine revs a bit high and i can up shift very soon with the 2.4's torque and it almost wants a 6'th gear as far as i am concerned.

[tx_wrx]

there is no 39mpg on the window sticker. The 2.4 gets something like 22/29mpg.Reving the engine less will help mileageaccelerating slower will helpshifting to neutral and coasting when you know you are going to have to slow down anyway, can help mileage. Driving as close to 50mph in 5th gear as possible will help mileage.

[tx_wrx]

>> I averaged 29mpg at 100km/h and was curious if i went a little slower would it get any better on yeah so you got 29mpg at 62mph. Going slower will get better mileage but you want to make sure you dont go too slow. I would recommend you dont let the engine get below 2000rpm since most engines start to bog down low and you run into a situation where the motor is overstressed and you end up giving the car too much gas because it wont respond. So try going a little slower 50-55 and see the difference.

[MountainMax]

yeah, my next trip over the highway im going to lower my speed 10km/h and try that, I can go pretty low in rpm's though with this engine as it's very torqy.

[MountainMax]

I have my window sticker and i can scan it in to show you if you're calling me a lair

[prathman]

The Canadian mileage estimates are quite different from those in the US. That's partly because of using the larger imperial gallon vs. the US gallon and the testing methods are also different. Was your 29 mpg figured using the US or the Canadian gallon?I'd expect the optimum speed for maximum economy to be pretty low - say around 50 mph, but with a pretty flat minimum so you don't lose much by going 60 mph instead.

[DarkSpork]

Quote, originally posted by tx_wrx »>> I averaged 29mpg at 100km/h and was curious if i went a little slower would it get any better on yeah so you got 29mpg at 62mph. Going slower will get better mileage but you want to make sure you dont go too slow. I would recommend you dont let the engine get below 2000rpm since most engines start to bog down low and you run into a situation where the motor is overstressed and you end up giving the car too much gas because it wont respond. So try going a little slower 50-55 and see the difference.I disagree. My engine won't bog unless the speed is below 1400 rpms. Shifting at 2300 has never caused my engine to bog. I think that mainly applies to older engines. Driving this way I average about 28mpg in my GT but have got as much as 35mpg.

[Yanner]

Different car, same engine/transmissionhttp://www.cleanmpg.com/forums...13674My best mileage was almost 30mpg(US gallon), all highway, but with some bad traffic and 2 mountain bikes behind the car on a hitch rack. Just got my first oil change today (5400kms on the car) and hope to report back a higher number after this weekend's road trip (yet another mountain bike race!).-Yann

[ou.grizzly]

Any engine will not reach it's full potential until it is broken in which may be after 10,000 miles on the vehicle. Accelerating slow, avoiding stop and go traffic, driving a speed of 55 mph constant, and having tires with low rolling resistance helps on obtain spectacular mpg.

[njcorny]

I just took a trip down to the states (speed limit 75 mph). My fuel mileage was between 32 - 35 mpg (Imperial gallons - not US). I was doing between 80 - 85 mph most of the way with air conditioning on. Since getting home, I've been getting around 36 mpg - combined city/highway. It's kind of disappointing after getting in the 40's with my 04 Vibe, but I'm going back down south in a couple of weeks and I'm planning on driving the speed limit (if my patience holds out) next time. Both cars are stick shift and yes the revs are waayy too high on the 09. I think they geared it that way so that it is more peppy, but it is harder to shift smoothly. I would have really liked to see a 6th gear for highway driving.