any mods to improve gas mileage?

General Discussion forum for Versa Owners
lordthygod
Posts: 48
Joined: Sun May 18, 2008 9:05 pm
Car: Versa/nx2000

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by learning ecu i mean an ecu that adapts to the driving style of driver. If i i let my buddies borrow the car, the ecu adapts to there driving habits and changes the fuel map to so that the power is applied in the rpm ranges they usually drive in.


versaBRN
Posts: 5
Joined: Sat May 31, 2008 6:53 pm
Car: 2008 Nissan Versa SL W/CVT

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Hey.. first time here.. For an add on system look up or build your own H2O fuel system. (It's surprisingly simple)Hydrogen is safe and combustable! Add it into the air intake system near the TB. My friend built and put one on his 92 camry.. (230K). Got 6 mpg better on the hwy (than normal hwy)! I can't wait to modify mine to fit it on my Versa!!!

Griema
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Joined: Mon Jun 02, 2008 12:36 pm

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I travel close to 40 miles each way to work and back, no traffic, all highway (speed limit is 55) except for 10 minutes near my home (2 stop signs, 5 possible red lights, 25-45 speed limits). I started watching MPG's after my second oil change at 7500 miles. I have a CVT and have never been below 38 in the summer, 35 in the winter. I have 33K miles now.

*When starting from a stop, keep the tach BELOW 1900 rpm. Start by quickly pushing the peddle in and watch the tack "jump" to 1900 then back the peddle out until you hit 1700. Hold at 1700 and increase if your going faster than 45. This will give a nice acceleration all the way to 45. It's not break-neck, but it's faster than a Chevette or Metro. If your accelerating to a different speed, look to see what your "cruising" tach is at that speed. For me, 55 is 1900, 45 is 1700, 35 is 1300. I back the peddle out until I hit that RPM and reach the speed that way. I can tell by the sound of the engine now.

*Synthetic oil MAY save MPG's depending on what crap you were using. Don't expect synthetic to save everyone money, it mostly does that by extending change intervals. If your using the sludge at a shop, you have a higher chance of seeing an increase by switching.

*Remove all excess weight... EXCESS, not your spare tire (unless you're really confident)

*Leave your windows up above 45 MPH. If it's hot, go ahead and use your A/C. The 1-2 MPG drop from using the A/C is the same as those large windows ruining the air flow by opening them, so your better with the more comfortable A/C (Consumer Reports did a study on this as well as the MythBusters). Below 45 MPH, open the windows and shut off the A/C. Also, don't use "MAX" or "Recirculate", just normal A/C and vent. Use Fan 4 until the car is rather chilly, then turn off the A/C but leave the fan on 4. When it starts to get toasty, turn the A/C back on. I don't live in Arizona, so this won't work everywhere

*Shut off the car if your going to idle for more than 30 seconds. Hypermilers say 10 seconds for fuel-injected cars. Your choice.

*Use neutral on downward slopes, stay in drive on drop-off hills. This doesn't save gas, it saves brakes. For maximum gas savings, neutral when coasting... always. I have a CVT, remember.

*CAP the car! I drive on very hilly terrain. I cause many horns, middle fingers, and the sweetest things said about my mother. I use CAP - Constant Accelerator Position. I go down hills at 64 and up the other side at 52. This, along with lower-rpm accelerating, is the BIG MPG booster! The others are so-so. My target speed is 57.

*57 mph is the optimum MPG speed I've found. Others may be slightly slower or slightly faster. At 57 mph, I use .736 gallons/hour. At 85 mph, I use 1.645 gallons/hour. The CVT was "geared" for 55 mph, the EPA highway speed for MPG testing. Way to go Jato! This gives excellent performance, though, as I've never had an issue passing until gas hit $3.75, now I won't, but I could I wonder if the motive was to have a very nice launch for passing capability or a nice high MPG number under highway (2007 and earlier testing standards). My sticker says 38, didn't they lower it to 36 half way through the 2007 model year?

BTW, this would work on virtually any car. With gas at and over $4/gallon in most of the country save South Carolina, any little bit helps, no? I drive about 40 miles to work with 36 of them highway. I used to get there in 34 minutes at 80-90 MPH. Now I get there in 39 minutes at 57 mph. I used to fill up 11 gallons every Tuesday, now I fill up 8 gallons every Tuesday (give or take 1/4 gallon). $12 bucks a week, is it worth it? Depends on you, really. I'm getting ready for $6 a gallon. At $7, I buy a Civic.

longo
Posts: 276
Joined: Wed Jan 24, 2007 12:38 pm
Car: 2007 Versa SL, CVT

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Ahh, another forum thread of people wringing their hands over the difference of a couple of MPG on the Versa.

I [picked up the new copy of Consumer Reports on 08' new cars today, and guess what....

under "Worst Milage"..the Versa @ 28 mpg combined, was first of the Worst on the list of cars under $25,000

As for mine, I wish I could get 28 mpg combined.

DejaWiz
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Just filled up my V last night. This last tank was 23.6mpg using 87 regular. That's up from 21-22mpg using 89 w/10% ethanol and down from 28-30mpg when running 91 premium. My daily commute is a mix of about 30/70% rush hour stop and go/interstate with fluctuating speeds.

With 9.9:1 compression and a huge loss with the ethanol (go figure...), I'm sticking with premium. It'll be cheaper in the long run:

89 w/ethanol is $3.799/gal87 regular is $3.899/gal91 premium is $4.049/gal

900 miles per month:89 @ 22mpg = $155.4187 @ 24mpg = $146.2191 @ 28mpg = $130.15

Using 91 over 89 saves me $303.12 per year.Using 91 over 87 saves me $192.72 per year.

Might seem like more money at the pump, but in the long run, I'm saving a bundle.

I might try getting a more free flowing exhaust and a CAI to see if I can squeeze a couple/few more mpg out of it.

longo
Posts: 276
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Car: 2007 Versa SL, CVT

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Your MPG numbers only indicate what Old School car guys have been warning us about for the last couple of years..."avoid ANY gas brand that includes Ethanol. It has a very weak burn number compared to regular gas, so you could lose a minimum of 10% and more just from that.

I have done some long trips in our Versa and noticed dramatic difference in perfomance and mpgs on different gas brands.

Of all the various gas brands along the way on a 6,000 mile round trip over 12 days, I found that the Versa loves Chevron best. Put in another brand and the little 4 cyl motor pulls like it's missing a piston and the gas gauge drops off the full mark, twice as fast .

As for Ethanol, the Old Timers are right-on about it being a huge rip off in more ways than one.

Ethonal is creating a huge upward impact on food prices, costs more per gallon to produce than gas, and in production creates as much or more polution than gas, and has about half the BTU's of gasoline.

It's nothing more than a disguised farm subsidy that is doing nothing to decrease fuel consumption.

My advice to you is experiment with different brands of good grades of regular or mid-grade gas in your Versa and drive on by the Premium and Ethonal pumps.

The last driveathon we were on this spring required us to take our Honda Odyssey Van, we were getting 23 to 24 mpgs on Chevron regular and that dropped to 19 as soon as we re-filled with Brand F'...(Chevron is not avalable where we live)

The next generaton of fuel efficent cars is on the horizon or just over, and the Tech-Trend is small displacement 4's with tiny turbocharges not much bigger than a salt shaker.

There are 1.6 ltr (or smaller) T-Charged engines arriving on the market this fall that will get about double the MPG's of the Versa, and 2.2ltr desiel engines in Honda Accord sized cars (meets polution standards in all 50 States) that will get you well over 40 mpgs in the city and 50+ mpg's on the highway, and unlike the sooty, desiels of the 80's and 90's, these new engines are quiet, well mannered and have power to spare.

The Tiny-Turbo gas engines with 200+ foot pounds of Torque, in compact cars are just as impressive, I am looking forward to shopping for one when it's time to pass the Versa on in a couple of years.

5

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srellim234
Posts: 2710
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Interesting, since our Versa has only consumed Chevron 87 octane with the exception of one tank since we bought the car last July. That was a tank of Mobil on my cross country trip when I didn't have a Chevron within range.

I wonder if that's a contributing factor to the success of our 2002 Buick Rendezvous 6 cylinder. That car has been rock solid and has also been exposed almost exclusively to Chevron 87. It's averaged 26, 28 and 29 mpg on three cross country trips, too.

longo
Posts: 276
Joined: Wed Jan 24, 2007 12:38 pm
Car: 2007 Versa SL, CVT

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Nice atricle on the airofoil idea...but, as strage as it sounds, the square butt little Versa is allready rated near the "Low range" of drag coifficient at .31

I am very leery of this factory number but have no way to prove or disprove it...one thing I do know tho' is the Versa is Very prone to wind conditions...mpgs go up by 10 mpgs instantly (I have a Scangauge) when you get a little tail wind, and then drop like a rock when you lose it.

A very arodyanamic shape like a .31 cd, should not be so prone to those changing wind conditions IMHO.

I think the cars of the future where everything is up for re-disign to increase MPG's the first thing would be to lose those two big wind whistling side mirrors.

They could do that by mounting 2 little rearview cameras like the ones now used for back up safety..(a great idea BTW) and put the viewing screen where the Rearview mirror sits now..or elsewhere, just get rid of those ugly bug bashing, noisy, grime covered mirrors.

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srellim234
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The new Aptera coming out later this year has picked up on that concept and eliminated the mirrors in exchange for a panoramic view of the rear and sides of the car using cameras.

http://www.aptera.com/details.php

longo
Posts: 276
Joined: Wed Jan 24, 2007 12:38 pm
Car: 2007 Versa SL, CVT

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Don't get me wrong, even with Chevron gas the Versa mpg's still suck. Without Chevron gas in the tank, we are looking at low to mid 20's..with Chevron, about what you are getting with your Buick!

Just noticed with interest your spotting that wind Damn mirror problem I was ranting about.

Another good reason to look forward to a new/better car in a couple of years.

Griema
Posts: 6
Joined: Mon Jun 02, 2008 12:36 pm

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Ethanol can be a great fuel in a car specifically tuned for it. PTBE and MTBE were better combustion additives to gas than ethanol, but putting Teflon into the drinking water was worse for us all than a little Jack Daniels. Ethanol is a huge performance reducer in gasoline or even gasohol engines. "Flex-fuel" has been around since the 50's, it used to be gasohol. Comparing names on gas stations is disengenious. Your Chevron may use a very nice blend of good quality gas, mine does not. In fact, there is one Sheetz around me that has consistantly given me better gas mileage than the Chevron, Get-Go, and Marathons. Different regions use different suppliers, experiment and find the best in your area. Multiple Sunoco's have been the worst for me, for example. Ethanol is a necessary environmental evil, so goes the claims. I'm positive there are better chemicals out there to replace the PTBE and MTBE additives, but we will likely never see them. (Am I wrong about the MTBE, was it just PTBE that was replaced or vice-versa?)

I'm shocked at these numbers! 25, 28, 27 MPG? Amazing, I've never dipped below 33, maybe I got the "good one" off the line? Even on a trip from Pittsburgh to Tampa at a good 90 mph run on I-95 most of the way, with the rest being "Speed limit +7", I averaged 34. Driving into town for a seminar for two weeks straight in absolute STOP and GO rush hour traffic (5.7 miles in 45 minutes) I combined 30 over two tanks for those two weeks. My only "mod" is Amsoil Synthetic 5w-30. My tires are at 36 all around (cold) and my air filter could have been changed 10K miles ago, I'm at 33K miles and only the second stock air filter.

How are you guys accelerating? I know Nissan put an absolutely FLAT torque curved engine into our cars. As such, the higher the RPM, an exponentially greater fuel flow is required. 3K RPM should be avoided at all costs. I found a nice "niche" in the CVT. By stabbing the gas peddle to allow a quick rev to 1900 RPM, and then a slight release, the car "shifts" the CVT from a "fixed gear" into a nice steady increase in ratio. I stab the gas just enough to allow this "shift" right at 1900 RPM, as the tach drops from the "shift", I slowly push the peddle inward. It settles around 1200, while I'm pushing the peddle inward still, then climbs. I equalize the peddle when it climbs to 1500 and hold it there. At around 45 the tach increases to 1700, 55 is 1900... and onward. It results in a nice pull out and my MPG's are much closer to sticker. In all highway driving, I'm still around sticker. Lifetime average is around 38 MPG by fillup, not total miles. Using even less throttle will result in even better MPG's.

There is an absolutely, created by the car-Gods road by my house. Just hilly enough to create bank in the curves. 2-1/2 lanes wide, nice vision, and the limit is 45. Going ALL OUT on this road, for 1-1/2 miles eats nearly a quarter tank in gas. This car is only fuel effecient when absolutely babied. Any hurried driving REALLY uses alot of fuel. For MPG, the Corolla or Civic would have been the better choice for me. I paid $14.5K, I wouldn't have half the options in those other cars. Live and learn, $4 gas sure is an eye-opener for me.

longo
Posts: 276
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Car: 2007 Versa SL, CVT

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I don't think there will be an Aptera in my driveway now that I have looked at your link, call me old fashioned, but that thing is an egg on stilts!

No, my next car will probably have an engine like this one....

"General Motors will unveil a Chevrolet compact car at an auto show this fall, with production slated to begin early next year, say sources familiar with GM’s product program.

The vehicle will be built on the Delta compact car architecture at GM’s plant in Lordstown, Ohio.The car will use a new 1.4-liter global engine that GM developed and recently announced in Europe.The car’s engine will be capable of developing between 120 and 140 hp. Sources say mileage could easily exceed 40 mpg.

“It’s a pretty incredible engine; it’s direct-injected with great power,” the source says. “The small-displacement turbos make it possible to get great power so that GM might put it in the mid-sized products, too. It’s an extremely important engine and a very capable powertrain.”

So says GM.

Not as impressive as some of the other little T-chargers running around Europe, but at least GM has finally taken their head out of their @#S and decided to get in the MPG game.

I think Nissan is now fully occupied with their new "all-electric" car for 2010


DejaWiz
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longo wrote:Your MPG numbers only indicate what Old School car guys have been warning us about for the last couple of years..."avoid ANY gas brand that includes Ethanol. It has a very weak burn number compared to regular gas, so you could lose a minimum of 10% and more just from that.
I've always known ethanol was a stupid thing, but I did a 2 tank test to see if the Versa would efficiently utilize it. Both tanks only gave 21-22mpg, so I switched to premium and it shot up to 28-29mpg. Lots of hills/inclines on the way to work when I drive the in-town portion, and lots of speed fluctuations (sometimes have to come to a dead stop numerous times) during the interstate portion of my daily commute.

I have had zero opportunity to take the V on a steady road trip, but I'll get my chance in exactly one week.... I have to drive to Kansas City to catch a flight. I'm quite anxious to find out what kind of mileage the V will provide at a steady 75 MPH down I-29, which is mostly straight, smooth, and flat the whole trip.

joven
Posts: 16
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Car: 2008 Versa 1.8 S MT

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I don't understand where your consumer reports quotes come from. Comparing the Versa with the Civic on consumerreports.org shows them with a scant 2 mpg difference between them in CR's overall rating.

2008 Civic EX MT Overall: 31 City/Hwy: 22 / 40 150 mile round trip: 37

2008 Versa 1.8 S MT Overall: 29 City/Hwy: 21 / 36 150 mile round trip: 35

DejaWiz
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joven wrote:I don't understand where your consumer reports quotes come from. Comparing the Versa with the Civic on consumerreports.org shows them with a scant 2 mpg difference between them in CR's overall rating.

2008 Civic EX MT Overall: 31 City/Hwy: 22 / 40 150 mile round trip: 37

2008 Versa 1.8 S MT Overall: 29 City/Hwy: 21 / 36 150 mile round trip: 35
It was in the latest car buyer's annual issue, iirc.

Griema
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http://www.consumerreports.org...x.htm

It as the SL, so CVT not MT. 20 city/36 highway 28 combined

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srellim234
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Comparing manual transmission to manual transmission, the Honda Civic is delivering 4 mpg better than the Versa at fueleconomy.gov.

The Honda with AT is delivering over 2.5 mpg better than the Nissan with CVT.

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srellim234
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longo- according to this article the new Scion Hako is going to use cameras instead of mirrors. I'm not too sure about the safety of having the screens mounted on the inside of the doors, though. They should put them on the dash somewhere.

http://finance.yahoo.com/famil...-2008

The Scion website still lists the Hako as a concept with streamlined mirrors.

longo
Posts: 276
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I have seen the model you mention, and who knows, it might be just what some tiny segment of the car buying public will open their wallets for. If nothing else the 'lose the mirrors' idea might be catching on.

After the bad press from Consumer Reports listing the Versa as one of the "Worst" buys for milage, I found this item that makes up for it.

Eight Cars to Drive in a Recession Ford Escape Hybrid Honda Civic Hybrid Honda Pilot Infiniti M35 Lexus ES 350 Nissan Versa Hatchback Scion xB Toyota Prius

joven
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Griema wrote:http://www.consumerreports.org...x.htm

It as the SL, so CVT not MT. 20 city/36 highway 28 combined
.

So the difference between a best buy and a worst buy is 4 mpg? According to the CR table, best budget cars are 32 mpg and up, and worst are 28 mpg and down ... Isn't this a pretty slim margin? Seems like a pretty weak categorization given the wide range in mileage people have reported on this forum.

Alphahawk
Posts: 33
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I have only had my Versa SL hatch for a few weeks now and have 2k miles on it. I run up miles quick on a vehicle....Ford 2001 SportTrac 261,000 and still going. I was scared of the truck and bought the Versa for comfort...for a small car.....carry what I use....golf gear, cooler, fishing gear. I was scared to death of what my MPG would be after finding this forum after purchase. My fears...at least for me are baseless. After a fill up today with 180 miles highway and 180 city I had 34.2 MPG. The highway was done at just under 60mph. A recently completed trip on interstate trip of 406 miles driving at 66 mph gave me 43 MPG. Sounds too good I know but my figures or bank account don't lie. But I got good results in the Ford compared to other SportTrac owners. Twenty MPG city and 24MPG on the interstate. I track each tank of gas I use in every vehicle ever owned and will continue to do so. If something changes I will report back but it should only get better. I am very anxious to get on the interstate for another long trip to check the MPG again. My nephew has a 2004 SportTrac and only gets 16 and 18. He did not believe me until he borrowed mine one day to move as he had a tonnau cover and mine was open. I guess I am just lucky but I am very happy with my MPG with the Versa so far.

STUMP JUMPER
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My V S w/6speed has 55,000 on it now. I was driving from Tulsa to Houston every weekend and found what really made a difference, throttle! My best freeway was 36mpg @65 with plenty of room between cars. Worst was 27mpg @ 85 and riding arse. City driving I get 25, but Im not trying to get driver of the year. I've gotten 28 on a 400mi trip w/the V pulling a trailer & 4 adults

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c5neb
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Amen on the 36 mpg, Stump Jumper!!! My V loves cruise at a steady speed. The V pulls a small trailer very nicely. Glad to hear another V owner doing well in that area.

boingo82
Posts: 45
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Car: 08 Versa SL CVT!

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Exactly - drive so you do not have to brake. See a red light ahead? Get off the accelerator, even if the light is a mile away, and coast in. Usually it will change before you get there, and you won't have to brake at all.

Every time you brake you are throwing away all the gas you used to get to that speed. The more you can avoid doing that, the better.

SL CVT hatch and I get 32-35 city-highway. US gal.

Bergerman
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Very interesting reading on the MPG averages. It appears that my first tank at 28 combined may not be too out of line with the national average. Looking forward to taking this car up to Mizzou for a game next season so I can really check the milage on the highway and see where it falls on the pure highway driving.


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