MPG Disappointment

6MT · 06-22-2012, 10:54 AM

Quote:

Originally Posted by onzedge

That is a very logical approach.

But not too practical for sports car shopping.

shadoquad · 06-22-2012, 10:55 AM

Quote:

Originally Posted by 6MT

But not too practical for sports car shopping.

I'll see you at the pumps!!! Or maybe not, maybe I'll be at the pump up the street!

onzedge · 06-22-2012, 11:01 AM

Quote:

Originally Posted by shadoquad

I'll see you at the pumps!!! Or maybe not, maybe I'll be at the pump up the street!

Coon-azz · 06-22-2012, 11:06 AM

I'm a big Porsche fan, but more towards the Cayman S model...kind of right in the middle of all of them. Anyway, I don't think you're comparing apples to apples.... I think if you bought the Z to be a straight line beast, you bought the wrong car. While 300 + RWHP isn't too bad, my pontiac solstice was pushing that to the ground and did 0-6 in under 5 seconds. Now thats a power to weight issue too but after around 80 MPH, its not going to contend with a big V8 or muscle car. Put it into the turns and most V8s wont see anything but its tail lights. The Porsche is a great car and each has its own purpose. After having the Z for a few months now, it's definately designed for carving up the curves.

Its a purpose built car. I bought mine as a daily driver, so I made no mistake that this was going to be a canyon carver for the daily grind and not a weekend trailer queen. And for the $, I think it's pretty refined; campared to my previous Pontiac Solstice GXP. There are a lot of great cars on the road to choose from. Perhapse look at getting a used Porsche for the weekend rides or something?

kenchan · 06-22-2012, 11:09 AM

Quote:

Originally Posted by shadoquad

I'll see you at the pumps!!! Or maybe not, maybe I'll be at the pump up the street!

kenchan · 06-22-2012, 10:16 AM

everyone should get the tornado or watever it's called jammed up their intakes. get a couple for the exhaust too.

onzedge · 06-22-2012, 10:21 AM

Quote:

Originally Posted by kenchan

everyone should get the tornado or watever it's called jammed up their intakes. get a couple for the exhaust too.

Hey, those things are no joke.

kenchan · 06-22-2012, 10:23 AM

Quote:

Originally Posted by onzedge

Hey, those things are no joke.

i think they have a kit that also somes with the turbo/bov sound generator too.

onzedge · 06-22-2012, 10:27 AM

Quote:

Originally Posted by kenchan

i think they have a kit that also somes with the turbo/bov sound generator too.

OOOOOOOHHHHH -- I hope so!!!!

kenchan · 06-22-2012, 10:36 AM

Quote:

Originally Posted by onzedge

OOOOOOOHHHHH -- I hope so!!!!

Augustus · 06-22-2012, 10:40 AM

Quote:

Originally Posted by gy954

So there's the new Porsche Boxster. Beautiful car. Great performance. Spanks the 370Z in just about every way...which it should, since it costs almost twice what a Z costs. And it gets 30 mpg, while my 2011 Base+Sport is getting about 20 mpg. I'm bummed. I didn't buy the car for its fuel economy, but really!

What do you think about the 370Z'z mileage?

Regarding the Porsche Boxster Vs. 370Z comparison, pay attention to what you're actually comparing...

A Base Boxster has a 265hp 2.7L engine*. It's rated @ 30mpg highway. $50K
A Boxster S has a 315hp 3.4L engine*. It's rated @ 28mpg highway. $61K

A Base Cayman has a 265hp 2.7L engine. It's rated @ 27mpg highway. $52K
A Cayman S has a 320hp 3.4L engine. It's rated @ 26mpg highway. $62K.
A Cayman R has a 330hp 3.4L engine*. It's rated @ 27mpg highway. $66K.

*These engines are newly Direct-Injected, which accounts for their MPG improvement over the other engines.
(And no, this isn't from memory, I'm looking at porsche.com for the numbers)

A 370Z has a 332hp 3.7L engine. It's rated @ 26mpg highway. $33K. No direct-injection.

A base Boxster should trump a 370Z's MPG because its engine is direct-injected, a liter smaller, and produces 70hp (and 60 ft/lbs of torque) less than the 3.7 in the Z.

If you want the ~330HP & similar torque that a 370Z brings to the table, you've got to look at a Boxster/Cayman S or better. At that point, you're within a couple of MPG of a 370Z. A Cayman S, is exactly the same @ 26mpg. 1-2 mpg differences are quite irrelevant, as the difference will vary much more than this by driving style, driver, conditions, etc. And especially when we're talking about $60K+ cars, who cares about 1mpg more or less?

Am I happy with my Z's fuel economy? Yes. The EPA window sticker on my 2011 370Z MT says 18 city, 26 highway. With 6,700 miles on my odometer, I'm getting 16-19 in the city (highly dependent on the trip distance & my right foot). Steady, 70mph cruise-control highway with negligible wind, I'm seeing ~27 mpg. This is stock + K&N drop-ins, if that makes any difference (which I doubt).

I would humbly suggest that if your Z is literally only getting 20mpg on the highway, something may be wrong with your Z. I'd get it checked out.

onzedge · 06-22-2012, 10:42 AM

Quote:

Originally Posted by Augustus

Regarding the Porsche Boxster Vs. 370Z comparison, make note of what you're actually comparing...

A Base Boxster has a 265hp 2.7L engine*. It's rated @ 30mpg highway. $50K
A Boxster S has a 315hp 3.4L engine*. It's rated @ 28mpg highway. $61K

A Base Cayman has a 265hp 2.7L engine. It's rated @ 27mpg highway. $52K
A Cayman S has a 320hp 3.4L engine. It's rated @ 26mpg highway. $62K.
A Cayman R has a 330hp 3.4L engine*. It's rated @ 27mpg highway. $66K.

*These engines are newly Direct-Injected, which accounts for their MPG improvement over the other engines.

A 370Z has a 332hp 3.7L engine. It's rated @ 26mpg highway. $33K. No direct-injection.

A base Boxster should trump a 370Z's MPG because it's engine is direct-injected, a liter smaller and produces 70hp (and 60 ft/lbs of torque) less than the 3.7 in the Z.

If you want the ~330HP that a 370Z brings to the table, you've got to look at an Boxster/Cayman S or better. At that point, you're within a couple of MPG of a 370Z. A Cayman S, is exactly the same @ 26mpg. 1-2 mpg differences are quite irrelevant, as the difference will vary much more than this by driving style, driver, conditions, etc. And especially when we're talking about $60K+ cars, who cares about 1mpg more or less?

Am I happy with my Z's fuel economy? Yes. The EPA window sticker on my 2011 370Z MT says 18 city, 26 highway. With 6,700 miles on my odometer, I'm getting 16-19 in the city (highly dependent on the trip distance & my right foot). Steady-cruse, 70mph cruise-control highway with negligible wind, I'm seeing 27 mpg.

Nice analysis work,

kenchan · 06-22-2012, 10:43 AM

Quote:

Originally Posted by onzedge

Nice analysis work,

augustus is sailfree in disguise.

Cmike2780 · 06-22-2012, 11:07 AM

I actually thought 20mpg was still pretty good. I usually average around 22-28mpg of mixed, but mostly highway driving. On the highway, I can get it up to the low 30mpg's......then I see an open stretch of road and forget I'm trying conserve fuel, lol. Lately though, I've been borrowing my sister's Civic for commuting while I finish detailing the Z in the garage. I'm getting close to 40 mpg on the highway. I forgot how nice $40 fill up's with regular were.....but man, the commute is oh soooooo boring. It's like driving an appliance.

Nismo89 · 06-22-2012, 12:46 PM

i WAS averaging 25.3 miles.. but there's more than one person that hijack the key to mine. therefore the MPG is around 21.3 right now

06-22-2012, 11:06 AM	#4 (permalink)
Coon-azz Track Member Join Date: Mar 2012 Location: Fredericksburg,VA Posts: 689 Drives: '12 370z Sport DD Rep Power: 16	I'm a big Porsche fan, but more towards the Cayman S model...kind of right in the middle of all of them. Anyway, I don't think you're comparing apples to apples.... I think if you bought the Z to be a straight line beast, you bought the wrong car. While 300 + RWHP isn't too bad, my pontiac solstice was pushing that to the ground and did 0-6 in under 5 seconds. Now thats a power to weight issue too but after around 80 MPH, its not going to contend with a big V8 or muscle car. Put it into the turns and most V8s wont see anything but its tail lights. The Porsche is a great car and each has its own purpose. After having the Z for a few months now, it's definately designed for carving up the curves. Its a purpose built car. I bought mine as a daily driver, so I made no mistake that this was going to be a canyon carver for the daily grind and not a weekend trailer queen. And for the $, I think it's pretty refined; campared to my previous Pontiac Solstice GXP. There are a lot of great cars on the road to choose from. Perhapse look at getting a used Porsche for the weekend rides or something? __________________ I don't care how slow you want to drive; I encourage it. JUST GET THE HELL OUT OF THE PASSING LANE YOU TUCK FARD!!!

06-22-2012, 11:07 AM	#14 (permalink)
Cmike2780 A True Z Fanatic Join Date: Jun 2010 Location: Long Island Posts: 5,059 Drives: slowwww Rep Power: 30	I actually thought 20mpg was still pretty good. I usually average around 22-28mpg of mixed, but mostly highway driving. On the highway, I can get it up to the low 30mpg's......then I see an open stretch of road and forget I'm trying conserve fuel, lol. Lately though, I've been borrowing my sister's Civic for commuting while I finish detailing the Z in the garage. I'm getting close to 40 mpg on the highway. I forgot how nice $40 fill up's with regular were.....but man, the commute is oh soooooo boring. It's like driving an appliance. __________________ [09][MB][6-Spd MT][Touring][Stillen Gen III][K&N][Borla CBE][Evo-R] [ArchitTEK Photography]

06-22-2012, 12:46 PM	#15 (permalink)
Nismo89 A True Z Fanatic Join Date: Mar 2011 Location: Colora, MD Age: 37 Posts: 15,831 Drives: daily Zen and woosah Rep Power: 37388	i WAS averaging 25.3 miles.. but there's more than one person that hijack the key to mine. therefore the MPG is around 21.3 right now __________________ Why yes.. Mike Rowe of Dirty Jobs, The Ford Commericals,Deadliest Catch.. is my cousin. Facebook i outta back hand you with my right hand! and call you b*tch!..... and im Left handed!

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06-22-2012, 10:16 AM	#6 (permalink)
kenchan A True Z Fanatic Join Date: Aug 2009 Location: N/A Posts: 76,801 Drives: N/A Rep Power: 141522	everyone should get the tornado or watever it's called jammed up their intakes. get a couple for the exhaust too.