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Hatchbacks Nissan Versa Nissan Versa Real World MPG
847 messages, Last post on Nov 25, 2009 at 7:04 PM
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| I just achieved 35 mpg on my 08 SL CVT hatchback. Thats including 30% stop and go traffic in Los Angeles. | |
| Hello all. Well, it's only taken me 9300 miles in my 07 Versa SL sedan with CVT to finally get decent mileage. Today I got 29.3 mpg! And, no changes in driving habits were involved. I have even been running the AC. Up to now, my best mpg was just under 26. If I can keep it at 29 or even push it to 30 I'll be a happy Versa owner. Hopefully this is not a fluke. | |
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206 miles 5.4 gallons I have a 2008 SL hatchback with CVT. I drove it off the lot yesterday with 12 miles on the odometer and a "full tank" to stay with family overnight (I got a really good price buying out of state) about 15 miles away. Today I drove the odometer to 218 miles from NH to Maine over a heavily rolling landscape with very heavy rain for about 40 miles (thus 206 since leaving the lot). I refilled the tank (with a top-off) at 5.4 gallons near Bangor. I ran the air conditioner off and on during the rainy period to help defog the windows (about 20 min). Outside air temperature was about 71F. About 15-20% of my mileage was in-town driving and the rest would be reasonably classified as highway. My mileage, assuming the tank was similarly topped-off by the dealership - which is probably a conservative estimate) was thus 38.14 mpg without any break-in period! As a late season 2008 my car had the EPA mileage estimate of 2/33 mpg highway so I am extremely pleased with my actual mileage. Keep in mind that I set the cruise control to 60 mph because I didn't want to be too rough on the car during the break-in phase. I've heard a lot of rumors that the key to sucking the most mileage out of the CVT is to use cruise control and I have to say it works. Am I wildly optimistic to think that with a break-in period I could reach 40 mpg? I have to say that I am more than willing to drive a 60mph if that is some sort of sweet spot for mileage (my rpms held just below 2k for almost all of the highway time). Awesome car for the money!
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Replying to: fishshtick (Jun 22, 2008 5:21 pm) To break in the engine in your Versa, the worst you can do is use cruise control over the first few thousand miles. You should vary speeds and rpm's and let the transmission do much of the breaking, to properly seat the rings. If you are very light on the gas, you will achieve MPG in the 32 to 38 range.
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Replying to: fishshtick (Jun 22, 2008 5:21 pm)
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Replying to: daniknight (Jun 23, 2008 9:16 am) |
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Replying to: highmiler650 (Jun 23, 2008 7:40 am) thanks for the insights. You make some valid points, and I appreciate the pointer about not using CC too much at this early stage (do CVTs have rings?). That said, as a statistician I cannot see how my estimate would be much of an overestimate since I used a conservative estimation technique (e.g., it would be difficult to underestimate the amount of gas used, unless the dealership has some way to get much more gas in the tank than me). Sampling error would decrease somewhat in going from 5.4 to 10 or more gallons. but not by a huge amount (like going from 1 to 5 gallons). Indeed, a much bigger factor in any mileage estimation would be the fact that with more driving one would sample more of a mixture of city and highway driving conditions which will obviously reduce the mean highway value. We call this temporal averaging in my field and it is somewhat problematic in that it confounds variation with the mean and can obscure very important trends within the data. If one ideally wants to obtain a highway estimate of mileage then the mileage should only be estimated for the portion of a tank that represents highway travel and the same could be said of city driving. I don't know about you folks, but its a pretty rare event that I burn off a whole tank on a highway, much less 5 tanks (I believe that would probably get me roughly from Maine to Montana). If one wants to reduce sampling error it would be much better to calculate the mean of several estimates for purely highway trips (fill at the on-ramp and refill at the off-ramp). This would provide an estimate of the pure highway value and and estimate of what we call the standard error of the mean (different than the variance of the data itself). This value is useful in that it allows one to actually quantify statistically whether one mileage estimate is higher or lower than some expected value (like the EPA estimate). One could of course do the same thing for city driving. Another way to handle error is to estimate bounds on the likely error and estimate what that would do to the final estimate. In my case, some quick calculations show that my estimate would not be off by more than two miles per gallon had I somehow put a full third of a gallon less gas in the car than the dealership was able to (and I did slow my fill near the end and topped off, which I usually do not do, to guard against this error and make my estimate somewhat conservative). I don't mean to be unrealistic and I hope you did not think that I was claiming that I expect my car will always get 38 mpg, I'm just happy to not get the really poor mileage that some folks reported (i.e., 20's for highway). I would still be very happy with a Versa that gets 36-38 mpg on the highway brand new. I should clearlyl get more chances to quantify mileage and provide the sort of estimate I described above. cheers, Mike
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Replying to: fishshtick (Jun 23, 2008 4:38 pm) The engine has rings. Although modern cylinders have a "break in pattern" machined into the cylinder walls, the last two remaining pieces of advice - make that three pieces - are: 1. Varying engine speed helps seat the rings. Thus city driving is better than freeway driving, and freeway driving with cruise is the worst. 2. When cold,you shouldn't use more than 1/4 throttle. 3. When warm, during breakin (first 600-1000 miles) you should use no more than 3/4 throttle - no "pedal to the metal." Speeds up to 80 or 90 are generally fine though, top speed isn't an issue so much anymore.
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Replying to: micweb (Jun 25, 2008 3:38 pm)
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Replying to: micweb (Jun 25, 2008 3:39 pm) |
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