DNate

First of all I wanna say hi to you happy Z drivers!

I want to buy a 350/370z (didnt decide yet)

And I would drive a lot on highways, Autobahn mostly and I usually drive with around 100 MPH +/- 15 MPH (depends on the traffic)

I have read a lot of MPG and I really care only at constant speed at around 100 MPH.

Please dont tell me that "you buy a sport car and dont care about MPG..."

Thank you!

winchman

The trip computer on my Z will display the mpg for any speed you can hold for long enough for it to make a measurement. It takes several minutes, so I've never done it for anything over 70mph. I don't remember the exact figures, but there was a substantial drop from 60 to 70. I'd be greatly surprised if you could get more than 12mpg at 100mph.

rizznutz

I get about 14mpg doing 90(cruise control)

pbgrep

iTrader: (2)

I do a constant 80 and get horrible gas mileage, around 16-17 mpg, If the Z had one more gear it would probably be a tad better... I dont typically use cruise control as Im usually passing people so Im sure I could get 18-19 at 80

BrickyardZ2003

I know with mine I put cruise on at like 65, reset my trip computer's mpg gauge and pulled off 28 or 29 mpg! This is a bone stock 350Z, 6 speed. I know when I did the same at 75mph, it went down to like 20 mpg I believe.

pmab9918

iTrader: (3)

Who you calling happy!?

terrasmak

iTrader: (8)

Freeway travel I set the cruise at 80mph , I usually average between 24 and 28, best I have got is a 29 average on perfectly flat road ( Nebraska )

realist alive

/ thread

stuartc323

I drive from vegas to LA probably twice a month to visit and Im always getting 25 to 27 doing 85 to 110, my most recent trip was 100 the whole way home and I got 28 mpg, this is a 06 350z enthusiast.

Phenom

iTrader: (4)

I'm struggling to understand the scope of this thread. Are you trying to ask a question?

In any case, I guess I can shed some light. Dont expect good gas mileage at those speeds. Drag increases exponentially as speed increases. So every little increase in speed you're screwing yourself worse and worse. I can get close to 30mpg between 60-65 on a flat road. That seems to be the sweet spot.

winchman

I knew I'd need this someday.

pbgrep

iTrader: (2)

stuartc323

Coming from someone who hasnt taken their car above 3000rpms?

DNate

100 mph and you got 28???

Seems too good...I mean with a 2.0 TDI I get something around that... Is that really true?

Sorry again but it seems to good

Phenom

iTrader: (4)

I find it hard to believe unless it was primarily downhill or he got the Prius mod.

PerfZ

iTrader: (3)

I can get high 20's at 70-80 cruising, gotta believe it would go down pretty drastically at 100. No way is anyone getting those numbers at 100. As far as the OP's question, there is NO car that is not gong to get worse mileage at 100 than at our national average of 65-70. We don't have unlimited speed highways on this side of the pond so no one from here is going to offer any true insight.

707_Z

I've had my Z for couple weeks now and found driving in the 70's I could get about 25-26 if I was light on the throttle. I can't see getting better than that at 100

zaimer

Same here. I've had mine about a month and a half and its constantly reading around 24.7 mpgs. I usually go around 65-70 on the highways..

kingdom

Had my Z for 3 weeks now. I haven't reset it in a while and my average is 21. Sorry that doesnt answer your question haha. If you decide on the Z let us know the results!

rizznutz

On my way back home. About 60 miles commute one way.