Roughly how far can you get in a 2005 with a full tank? I mean 20 gallons is a pretty big tank for this car!

 

Its got to be like $71 to fill it at gas prices around $3.55. (Wisconsin)

 

Mine says 20/27 and I get 17/24 (24 with CC and 17 driving normal, I CANNOT get 20 in the city even being slower than grandma).

I think its reasonable to expect to at least MEET the mileage if you drive normal. My BMW I could drive hard and still get the EPA (barely better if I babied it, it just stuck right around 19-21).

 

I got 29.8Highway MPG last night going 65mph on 6th gear.

 

I been averaging 17mpg too on my 07....guess i just have a fat foot

 

Doubtful you got that. You only read the computer readout. The computer is not measuring gas usage when it figures mpg.

As I wrote earlier, there is only one way to accurately determine mpg.

 

try to keep in mind what kind of freeway your driving on. For example. Chino California to Anaheim California i can get 30MPG easy. but reverse direction its 22-23. While your driving you may not realize it but hardly any freeway especially in California is completely flat. Just the other day i noticed the elevation of the 5 freeway here in orange county is constantly uphill downhill, uphill downhill.

 

32.1 at 65 mph and 23.6 mixed driving and 26.4 at 80 mph .

 

How are you figuring this out?

 

You guys shouldn't doubt the computer (if you do). You need to understand the technology before you throw it out. The computer is accurate over a longer period of time. It needs lots of data before it can conclude what actual MPG you are achieving. Like after 1/8 tank. Throttle position is the biggest factor.
Try it! I did, that's why I know it is accurate.

 

You clearly know nothing about the EPA test procedure. You'll get the EPA mileage if you drive on a dyno and not on road, specifically follow the EPA test schedule and then measure emissions out the tailpipe rather than gasoline usage. Afterwards, you adjust the numbers downwards by 10% for city and 22% for highway to arrive at the value that goes on the window sticker. See http://www.nhtsa.dot.gov/cars/rules/...2003/index.htm.

See http://www.fueleconomy.gov/feg/how_tested.shtml and http://www.fueleconomy.gov/feg/fe_test_schedules.shtml regarding the procedure. The new tests in the 2nd URL are new for MY 2008 and beyond. Did you know that on MY 2007 and earlier cars, the highway test's MAXIMUM speed was 60 mph and average was 48 mph?

Even w/the new tests for MY 2008 and beyond, the EPA at http://www.fueleconomy.gov/feg/why_differ.shtml says your mileage will STILL vary.

BTW, Consumer Reports found mpg shortfalls on 90% of vehicles they've tested per http://autos.msn.com/advice/CRArt.as...tentid=4023460.

Since people are talking about trip computer accuracy, I've found the Z's trip computer to be usually between 0-1 mpg off from manual calcuations so it's not too bad.

The trip computer was almost always 2-3 mpg too high in my former 02 Maxima, sometimes as much as 4 mpg too high. The 2-3 mpg too high trip computer on the Maxima was normal. Everyone else on maxima.org w/that generation said theirs was like that.

 

i got 8 mpg this weekend at track