MPG on 370z??

shadoquad · 02-24-2011, 01:37 PM

Quote:

Originally Posted by failingboy

In case the obsessive tracking of mileage isn't enough to tip you off, yes I stringently adhered to the proper breakin procedure documented in the manual. Granted, I never got terrible mileage in the first place.

Those numbers are all based on my calculations, although the car's reading has always been within 0.5mpg at the very most.

I was just curious as to why we have such disparate observed initial values. I drove my Z practically off the truck. Had 4 miles on it when I drove it home. During the first several weeks, driving it as suggested in the manual, it had me at 16 mpg. After breakin, my mileage increased by 4mpg. I haven't obsessively tracked mine, so I'm wondering now if the ECU was wrong initially or if we were driving it just that differently.

failingboy · 02-24-2011, 01:50 PM

Quote:

Originally Posted by shadoquad

I was just curious as to why we have such disparate observed initial values. I drove my Z practically off the truck. Had 4 miles on it when I drove it home. During the first several weeks, driving it as suggested in the manual, it had me at 16 mpg. After breakin, my mileage increased by 4mpg. I haven't obsessively tracked mine, so I'm wondering now if the ECU was wrong initially or if we were driving it just that differently.

I wonder the same thing. I will say that my car was driven 300 miles from another dealership before I took delivery. Im sure it wasnt driven gently then, so the gauge read the lowest I've ever seen it when i bought it. Did your mileage actually jump up after breakin or just gradually increase?

I typically drive pretty conservatively, and always have. I usually shift at 2200-2500 rpm or so, sometimes at 3000, very rarely any higher, except for autocross/track.

shadoquad · 02-24-2011, 01:55 PM

Quote:

Originally Posted by failingboy

I wonder the same thing. I will say that my car was driven 300 miles from another dealership before I took delivery. Im sure it wasnt driven gently then, so the gauge read the lowest I've ever seen it when i bought it. Did your mileage actually jump up after breakin or just gradually increase?

I typically drive pretty conservatively, and always have. I usually shift at 2200-2500 rpm or so, sometimes at 3000, very rarely any higher, except for autocross/track.

It was fairly gradual, but it was only a matter of weeks. I drove it pretty hard after break-in. Still do, but that wouldn't explain an increase.

I guess maybe we can chalk it up to different driving styles/habits and different roads/weather possibly. But the hard evidence you've presented makes me think my experience may be the exception, rather than the norm.

jpritche · 02-24-2011, 03:20 PM

The average for the life of my car is 24.8 That is just what the car calculates(on that ugly silver screen on the left of the steering wheel). However, I have gotten 36 mpg on a tank(followed behind a tractor trailer for far too long to Louisiana)(pretty sure that was the most boring drive of my life), but the worst I have ever gotten is like 15. I am only 18 so I can't afford any tickets, especially not in this car, so I drive pretty safe for the most part.

For those who think the 36mpg is b.s., I have a video somewhere, I believe on my old iphone. The navigation in the car only reads up to 30, but after taking the miles divided by gallons, I came up with like 35.8 so roughly 36.

But like everyone has said, if you are worried about gas mileage you got the wrong car. I like to enjoy my car from 0-60 and then from there, we keep it legal.

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02-24-2011, 03:20 PM	#4 (permalink)
jpritche A True Z Fanatic Join Date: Oct 2010 Location: Cartersville, Ga Age: 33 Posts: 2,570 Drives: '15 RR, '14 IS250 Rep Power: 31	The average for the life of my car is 24.8 That is just what the car calculates(on that ugly silver screen on the left of the steering wheel). However, I have gotten 36 mpg on a tank(followed behind a tractor trailer for far too long to Louisiana)(pretty sure that was the most boring drive of my life), but the worst I have ever gotten is like 15. I am only 18 so I can't afford any tickets, especially not in this car, so I drive pretty safe for the most part. For those who think the 36mpg is b.s., I have a video somewhere, I believe on my old iphone. The navigation in the car only reads up to 30, but after taking the miles divided by gallons, I came up with like 35.8 so roughly 36. But like everyone has said, if you are worried about gas mileage you got the wrong car. I like to enjoy my car from 0-60 and then from there, we keep it legal.