Just Purchased A New '06 Base Roadster And This Is The First Car That The Automatic Is More Economical Than The Manual 17-25 Manual Vs 21-28 Auto And No One At The Dealer Could Tell Me Why.

 

I have gotten an amazing 29 MPG on a recent trip but it was driving down out of mountains and on very straight, flat roads. I often get 27 on the highway. In town if I drive very conservatively (and I rarely do - what would be the point?) I can get 21 MPG out of it. Normally mine hovers around 19 MPG in town. This is Dallas driving.

 

my last road trip... 95% highway (automatic) = 27.5 mpg.

 

I've been getting a sorry 15-17 mpg in the city, but it's not the car it 's this crappy Californian gasoline they have been raping us with, I swear they've increased the alcohol content from 10% to 15%. Maybe I should pick up a hydrometer and test my theory to really find out what's in this stuff. We pay about 20% more than the rest of the country and we get less mileage then other states, man are we getting screwed.

I have the manual and I used to get 21 mpg before they switched us over to summer fuel. so no I can't say the automatic is more economical, maybe it's your foot.

 

My guess would be a combination of the following three reasons:

1. Sophisticated gear selection computer electronics allows for higher efficiency than when a human shifts a manual.

2. The lockup torque converter reduces the slippage inefficiencies typically experienced by automatic transmissions.

3. The autostick equipped Crossfire weighs just 23 pounds more than the 6 speed.

 

If I'm on a freeway trip, I regularly get just over 30 - mine's a stick.
Round town/to and from work about 20-22.

 

On a highway trip 29-31, local driving 17-22 depending on how heavy my right foot is feeling...

6 speed manual.

 

I seem to get anywhere from sub 20 to just under 30 mpg on my 6 speed coupe (Imp galls. and 95 RON). More details in this thread:

https://www.crossfireforum.org/forum...4&postcount=14

 

With the 6 speed on the highway I can get over 30. But that doesn't happen a lot, I don't have that kind of self control.

 

I have seen upwards of 34 and change, and as low as 18 when i first started working on my exhaust because I was too busy playing with it to get a sound that I liked. lol The only draw back is that here in the mountains I can only get up to 91 octane without going to the race track and getting avgas.

'04 Ltd Auto
K&N filters
Cutsom Exhaust
2 10" MTX 5500's

 

I've only run 6 or 7 tanks through mine since I've owned it, all 93 Octane (TX), and I've averaged just under 26 mpg. That includes a good bit of 'spirited' driving, and a 70/30 highway/city mix.

I was impressed with the mileage, to say the least.

This is an '04 Auto, no mods.

SQ

 

I paid $3.24 this morning for 93 premium. Tell me about getting screwed!