wish i was miscalculating but there's slim chance of that and my speedo / distance is on the money too.

 

Sigh... OK, I give up. so much for that ethanol-free gas helping the mileage....I just re-filled today at 266 miles, and it took 10.4 gallons... a whopping 25.6 mpg for this tankful. all two-lane road driving. But these roads are wide, newly-paved, very little traffic, and I generally travel between 45 and 60 mph on them, all the way.

 

i thought it was funny that i was looking at the window stickers for the nissan sentra and the nissan versa, and the sentra with the more powerful engine got more mpg then the versa.

there are lots of things that effect gas mileage, power to weight, gearing, and aerodynamics.

you don't believe me, look at my dad's 2001 corvette couple with a 6-speed manual. 350 bhp, and he still gets better mpg then i do, the onboard trip calculator confirms it. why, because it weights about the same as the tc, but has over twice the hp, and more torque and gears. and is probably much more aerodynamic.

another thing is driving habits. cylon, shifting at 3000 rpms and accelerating as slow as possible does not equal good mpg. you gotta drive the car efficiently, not just slowly.

anticpate traffic patterns and try to maintain steady pace. i save alot of gas because i slowly coast in gear to red lights, and usually it changes before i get to the intersection, so i save some gas by reducing the number of times i have to move away from a stop.

also, the general rule of thumb for upshifting is 700 rpms above the rpm your car is at when in top gear at 60 mph.

26 mpg, sheesh, i'm supercharged and i get around that many mpg.

 

yes, well all that is well and good - I've been driving manual transmissions for 32 years, and am aware of all the above mentioned things - but most of that has no bearing on why the car won't even hit 29 mpg in strictly highway driving with the cruise set on 70. And I don't really see the dealer being concerned about it at all, since I'm getting mostly within the rated mileage for the car... and it seems I'm not the only one getting this kind of mileage.

 

I average 36+ at an average speed of about 50mph. Cruise set at 70MPH back and forth to work.

The worst it ever got was a trip down I44 from New Baden, Il to Joplin, Mo. A very hilly road and a 25mph headwind the whole way reduced my average to 31mpg. Cruise set at 75mpg btw.

When my wife drives the car she gets about 2mpg worse than I do.

My opinion is that the difference is in how high an RPM she shifts the car at compared to myself.

The lower RPM you shift at the better MPG you can get.

Also, use the cruise control whenever you can.

My high is 42MPG with a tail wind and without using the AC and the windows down it is not unusual to see 38MPG average between fillups.

I put on cheap/heavy aftermarket rims using the stock tires from about 500 miles on the ticker. The car now has 15,000 miles on it.

 

I am getting between 30-32mpg in my AT xD. I drive about 50/50, and put the car in N when cruising down hills on the back roads. I am still breaking in the engine, so I don't use cruise too much.

I had an 07 Corolla and averaged about 31 mpg. I used cruise as often as I could, and also put the car in N down hills on the back roads.

The reason you're probably seeing a more "efficient" corolla is because it is more aerodynamic (lower to the ground and not so boxy) and it is also lighter than the xD.

However, you should consider the Corolla has a larger gas tank than the xD (about 2 gallons more), so proportionally the xD is more efficient.

 

Damn man that sucks...I live in HOT AS HELL ARIZONA, drive with the A/C on and drive an AUTO and still get anywhere from 330-350 between fill-ups...And I too have 18" rims...I don't know what gives with your ride...I'm sure I deal with alot more traffic than you also...

 

F'k I barely get 300mi My car is broken!

 

sorry to hear that, 372mi right when the last blinking light came on

 

ya.... um.... i dont get how lots of you guys are getting such low mpg. im averaging 35+ driving 70 mph on the highway. thats with 18'' wheels too

 

Also add to wat draxcaliber said factor... things like differences in the tires' rolling resistance, intake system (from manifold to filter), exhaust piping, ecu, internals, & even variations from any 1 vehicle to the next are possible.

 

climate and elevation are factors also. the higher u r, the thinner the air is. lowering the car and opening the front bumper duct on the intake side will help.

 

They do in Alabama. I drove my xA to AL back in July and got 42mpg going down, filled up in AL at an Exxon that had ethanol mixed in and got 37.5 mpg on that tank.