I have. 1.8SL with the CVT transmission. I am filling up (89 octane) about every 2 weeks. It is all city driving. As my readout shows.... I am only getting about 25.1 mpg. I thought it was supposed to be closer to 28-30.
Don't know but have you checked by filling up and keeping up with miles till you fill up again ? thats really the only way to figure it .. I have gotten better on readout and it is gettin better with the more miles i'm putting on it
The theory is the computer is more accurate and it is regardless of the amount of gas in the tank. It measure your miles per gallon regardless of how much gas is in the tank. I asked a Nissan Tech why the computer was always higher than my manual calculations. His answer had to do with the actual pump be regulated accurately and quoted how many pumps in the region I live are in accurate. I found this to be true. In Montgomery County Ohio where I live there are only 3 pump inspectors. They publish the stations checked and accuracy of pumps. Over 70% were wrong and they never get to all the stations annually Scary.
I can't say how often I fill up because it varies, my work has me on the road in all kinds of driving conditions, some highway, city, mountain, etc. I check my average MPG before each fill up and several times on each tank. Mine averages (according to the computer) anywhere between 33.8 and 36.7, but never less than 33.8 with the last 4 tankfulls. My first couple tanks were as low as 27.7 and has gone up pretty steadily since then. I just went out and looked at what is say's now and it shows 34.6. I for one can't complain about my mileage. It's well above what Nissan said it should be so I'm a happy camper. I normally drive at least the posted speed limit up to about 10 MPH over, and I always launch like I have to be somewhere. I've never been a light foot but so far it hasn't hurt my mileage in the cube. - Dan
I now have a little more than 1,100 mile on my 1.8SL with CVT and have only filled up 3 times so far, but here are the stats . . . .
100% stop and go city driving (metro Phoenix area)
calulated MPG Dash Display MPG
1st tank 31.097 29.1
2nd tank 32.699 37.3
3rd tank 34.769 36.9
This is my first experience with a CVT and it truly is a different beast. I keep the dash display on the real time MPG setting and am constantly monitoring it. I notice that the slightest change (1/4") in accelerator pedal position can change the display from low 20s to low 50s MPG.
I'm still playing around trying to find the right ratio of RPM, torque and rate of acceleration. So . . . . driving style is the single most influencing factor.
The car I drove for the last 6 years (2003 Pontiac Vibe/Toyota Matrix) was EPA rated for28 mpg city,the same as the Cube. I always got between 31 and 32mpg. My wife drives it now and only gets 24mpg. Again . . . driving style.
So far I'm well pleased with the results and think I will continue to see improvements.
Better mileage as you drive may be that the computer (ECI on my Eclipse) "learns" the best mixture and timing as you drive. My Eclipse takes about 200 miles to relearn after a battery disconnect. Until then, the idle speed is way low - has to relearn that too. Just a guess. Plus, as parts seat, friction is reduced. That may be part of it.