fewest miles on one tank of gas? :)

[UHATEIT]

I am averaging 24-25mpg, I do mostly freeway driving but I go up and down a big hill everyday to and from work and I have to run the AC since its hot as hell here and there is also a bit of traffic in my area. 25mpg isnt that and I don't think.

My 350z appeared to get more miles PER TANK, but then again that car had a tank that was bigger. That also had one of those mpg guages that consistently stated 21.3 mpg almost all the time

 

[ms3jake]

Average 270-300 a tank, 80% highway. I floor 2nd-4th 2-3 times a week. I rarely floor 1'st,5th or 6th. Dont really shift over 3k on average. Cruise at 75 on the highway using cruis control. Worst I have ever seen is 21 mpg. Best 27mpg. noticed a little better milage after I got my Cobb sri. I used to never even think about mpg but now with these disurbing gas prices I watch ever tank.

 

[koston33]

I have a question for you guys, not meaning to thread jack just a quick anwser about gas. I have a 07 gt. The gas take holds 14.5 gallons right. My light comes on and I drive tilll the needle is almost on E, and when I fill up it says I've only put in 12.5 gallons. This means I have another 2 left in the tank. Y would it be on E with almost 50 miles left in the tank. Plus my trip computer says that Im at 4 miles left on the tank right before I fill up any ideas.

 

[Nliiitend1]

^^they try their best to make the system idiot-proof. You really shouldn't be driving around with a near-empty tank...

There is a "reserve" of about 3 gallons, meaning the light comes on when there's about 3 or maybe a little more gallons left.

The trip computer doesn't factor in the "reserve" to it's calculations either, if I'm not mistaken.

As far as my mileage goes, I consistently noticed about a 2-3 MPG increase after installing my BEGi Airbox a couple months ago. Also, I recently moved out of downtown Chicago and down to Jacksonville, FL, so I'm doing much more highway driving along with city driving. I went from getting around 14-15 MPG (exclusively city driving in stop and go traffic with LOTS of stoplights) to a pretty consistent 23-24 MPG (~75% hwy/~25% city).

 

[lestat13]

Mine last about 260 miles before i fill up, and i fill at at
1\4 of a tank

I'm close, sometimes I am around 220-240 when I hit 1/4 tank. I've landed there as low as 180 thought.... but I was having A LOT of fun with the car

(drive2) SKEET SKEET!!

 

[FrequentFlyer]

Warmer weather will net better mileage. What were the temps in Chicago a few months ago compared to Jacksonville, FL? Warmer, less dense air = less fuel to add. I always note worse mileage in the winter time than in the spring/early summer because of the temps. The fuel in the winter is also a crappier mixture, which has something to do with it also.

 

[tiagotiago]

The first weeks were the worst in terms of economy. The first tank was around 15.5 mpg. I just do intra-city driving.

Changed the route I took to work, got to 16 mpg.

(Avg. highs probably 120F, though in the street in mid-day it's probably a bit higher)

Cooler weather + finishing the break-in of my car = 17 mpg.

(Avg. highs around 90F)

Warmer weather will net better mileage. What were the temps in Chicago a few months ago compared to Jacksonville, FL? Warmer, less dense air = less fuel to add.

What temps do you mean by warmer weather?? I understand really cold weather does the car no good, but city driving in +120F temps does the fuel econ no good at all. Also less dense air = less power, so the car needs more work to get the car up to the same speed, and the added heat makes the coolant system work more to get the excess heat out.

Btw I have also heard that fuel companies change the fuel mix in the winter months.

 

[Nliiitend1]

Chicago in the summer is not much cooler than Jacksonville. Maybe 5-10 degrees on average, and not even that much in late summer...Plus, I didn't move to JAX until 2 weeks ago.

I understand the concept of very cold weather causing worse fuel economy than warm weather (some of which also has to do with the aforementioned fuel formulation change during winter), but I can say with a degree of certainty that outside temperatures have had little to nothing to do with my mileage increase...

 

[lestat13]

With the warm weather and installing an intake, I only saw 1 mpg difference. I was talking to someone today who said "hey, why don't you try gas without ethanol?"