poor mpg

[vududoc]

i recently purchased a new versa and calculated the mpg on 7 gallons to 14mpg!!!!!!!anyone else notice this. im currently tracking another 7.5 gallons but found this to be too odd to ignore. the engine is broke in so there should be nothing on that. driving habbits are that of a granny. any others with this problem. hopefully it resolves in the next few weeks over some tank loads.

[Neo Xian Wu]

maybe you got one of the bum fuel pumps?

[KimberKenobi]

your gas stations carry ethanol/methanol or did you recently fill up with such??

[CodeRed]

Are you sure your doing the math correctly? And also you might want to run it till the gas light comes on and fill up with some 93 ( i think is the highest octain at stations? ) and run that for a whole tank should clean things up nicely. If the bad MPG continues go to the dealer.

[NewToVersa]

I bought my versa 2 weeks ago. First tank, winter gas, first manual transmission car and i got 24.2 MPG... drove 202 miles and had 1/4 tank left... not bad

[motoguy128]

If that was your first fill-up after driving off the dealer lot, couple of possiblities.

1) The tank was less than full when the tripmeter was reset.

2) Cars idle at the dealer quite a bit, before you take delivery.

Try averaging the next 2 or 3 tanks.

14mpg isn't unreasonable if you drive in extreme stop and go city traffic and let the car warm-up 10 minutes each morning.

[ttg1003]

I got my new Versa SL 10 days ago with a CVT.Drove it on a highway mostly for a first week and the fuel economy was not too bad - around 7.2 litres/100km. Last few days a had only city driving with warming-up the engine every morning for at least 5min and the consumption was around 11 litres/100km. I heard many people complain about poor mileage on V but i don't see it so far. And related to this i have a question - what type of gas you're filling with and what would be the best type for the V engines? So far I'm using the 87 octane (bronze) - would that cause some problems on the new engine during the break in?

[Urq]

the 87 octane you are using is just fine.

[Jerky_san]

I dunno if its bad for the engine... but personally i just get in and drive the thing.. Only car i've ever really "warmed up" was my superbeetle but even then for around 20 to 30 seconds tops.. Just enough to get the oil flowing..

[dopey]

I've been getting awful economy of late too.. but i think it's got something to do with a heavy right foot and too many run-ins with honduh civics hahahah

[The Edge]

I dunno if its bad for the engine... but personally i just get in and drive the thing.. Only car i've ever really "warmed up" was my superbeetle but even then for around 20 to 30 seconds tops.. Just enough to get the oil flowing..

Very bad for the engine, all you need is 2 minutes to let the oil circulate and coat all the moving parts. Revving the engine while dry is very very bad. Your engine won't die is you just start and go but you are definitely shortening the overall life of the engine. Even in the warmer months you need to let the oil circulate. You can still drive with the blue temp light on which you obviously do. Some people like to "warm up" their car first but it's just a waste of gas. 2 minutes is all you need.

[bikeman]

Why do you think you need two minutes? Serious question. My guess is you've been driving for at least three decades.

David

[Eikon]

driving habbits are that of a granny.

I've ridden in a car with you.. Granny... HAHAHA!! yeah right!

LOL.. Just playing Lu-

I'd reset the ECU and give it one more full tank. If it doesn't improve.. head to the dealership. Might be some messed up knock sensors or 02 sensors or MAF or something like that. Unless you've installed an SR20 and voided warranty.. i'd make use of it.

[motoguy128]

Very bad for the engine, all you need is 2 minutes to let the oil circulate and coat all the moving parts. Revving the engine while dry is very very bad. Your engine won't die is you just start and go but you are definitely shortening the overall life of the engine. Even in the warmer months you need to let the oil circulate. You can still drive with the blue temp light on which you obviously do. Some people like to "warm up" their car first but it's just a waste of gas. 2 minutes is all you need.

Modern multiweight oils flow well and offer full protection at low temperatures. The oil pump is positive displacement therefore you have full oil pressure and full flow to all parts within a few seconds.

Needing to warm-up an engine was more important with some carbeurated engines that are "cold blooded" and tend to stall until warm. The reason to wait until the engine is warm before driving hard, is so all engine parts are evenly heated.

I do however warm-up my car in winter months for safety reasons. It needs to warm-up a little to get some heat to defog the windows some mornings. You also need ot warm-up the car to get heavy ice offthe iwndows.

[Vahagn23]

I get this too and I got 2k on my V

[vududoc]

I thank all that have provided input on this thread.Motoguy128-definate thanks on that input on viscosity.

Just a bit to add to my first post.... the thread was to see if others were having this problem.

Here is some background- car was purchased used at 9300 miles on a trade in. Car had qtr tank and i gassed up to 3/4 after sending it out for mods. Gave the wife the car as a early xmas present (im still walking though lol) and checked the tripmeter to see if it actually got the advertised mpg. a true 14mpg and yes my math was correct. I finaly got the car back from the wife and was able to run it on consult 2 only to find a whopping 87 on A/F alpha reading (should be 100). A/F was reset this pm and car driven over 36miles (city/hwy comb.) with out a budge on the needle

hope this helps others out if they see something like this. Essentially this is caused by idling too long and poor fuel quality from previous owners habbits being stored in ECM. it would have taken quite a bit to get this all resolved over tank loads and a quick reset was the easiest.

Thanks again for you inputs.

(hey eikon long time no see ...currently working on getting the IMPUL supercharger in the states for this car. ill post a seperate thread on this car...and most of my projects are other cars this is the "wifes car" he he he)

[nissantech06]

I thank all that have provided input on this thread.Motoguy128-definate thanks on that input on viscosity.

Just a bit to add to my first post.... the thread was to see if others were having this problem.

Here is some background- car was purchased used at 9300 miles on a trade in. Car had qtr tank and i gassed up to 3/4 after sending it out for mods. Gave the wife the car as a early xmas present (im still walking though lol) and checked the tripmeter to see if it actually got the advertised mpg. a true 14mpg and yes my math was correct. I finaly got the car back from the wife and was able to run it on consult 2 only to find a whopping 87 on A/F alpha reading (should be 100). A/F was reset this pm and car driven over 36miles (city/hwy comb.) with out a budge on the needle

hope this helps others out if they see something like this. Essentially this is caused by idling too long and poor fuel quality from previous owners habbits being stored in ECM. it would have taken quite a bit to get this all resolved over tank loads and a quick reset was the easiest.

Thanks again for you inputs.

(hey eikon long time no see ...currently working on getting the IMPUL supercharger in the states for this car. ill post a seperate thread on this car...and most of my projects are other cars this is the "wifes car" he he he)

On the A/F alpha, any reading between 90 - 110 is acceptable, with 90 being rich and 110 being lean.

[vududoc]

On the A/F alpha, any reading between 90 - 110 is acceptable, with 90 being rich and 110 being lean.

my mistake i believe i should have been speaking of long term A/F.

[nissantech06]

my mistake i believe i should have been speaking of long term A/F.

Another stat that might work is looking at the long-term short-term fuel trims...if your long-term fuel trim keeps showing that it's trying to lean the mixture out, you know you are running too rich.

[dopey]

well im glad to report i took it easy this tank with only a few moments of driving it hard.. and managed a much better 36.5mpg / 7.7L per 100km result (measured by the distance travelled on the trip computer and the amount of fuel i put in to the car when i filled up). This was with the air conditioner on 90% of the time too.

another thing to check too is your tire pressure. if it's too low your economy will suffer as well.

[BBISHOPPCM]

I did not hit 30 mpg until my car had over 20,000 miles on it. Now, i'm hitting upwards of 33 MPG!

[WDRacing]

I thank all that have provided input on this thread.Motoguy128-definate thanks on that input on viscosity.

Just a bit to add to my first post.... the thread was to see if others were having this problem.

Here is some background- car was purchased used at 9300 miles on a trade in. Car had qtr tank and i gassed up to 3/4 after sending it out for mods. Gave the wife the car as a early xmas present (im still walking though lol) and checked the tripmeter to see if it actually got the advertised mpg. a true 14mpg and yes my math was correct. I finaly got the car back from the wife and was able to run it on consult 2 only to find a whopping 87 on A/F alpha reading (should be 100). A/F was reset this pm and car driven over 36miles (city/hwy comb.) with out a budge on the needle

hope this helps others out if they see something like this. Essentially this is caused by idling too long and poor fuel quality from previous owners habbits being stored in ECM. it would have taken quite a bit to get this all resolved over tank loads and a quick reset was the easiest.

Thanks again for you inputs.

(hey eikon long time no see ...currently working on getting the IMPUL supercharger in the states for this car. ill post a seperate thread on this car...and most of my projects are other cars this is the "wifes car" he he he)

Glad it seems to have improved, let us know after a week of driving to see if she behaves. Then I'll add this to the FAQ as a means for troubleshooting mileage issues. Actually, I'm going to add it now in case I forget

WD

[Scottneon]

I've noticed that when I fill up and the nozzle clicks off I can sometimes put another gallon or gallon and a half into the tank. I average about 29-31 mpg. I don't really warm her up just like a minute or 2. It would be longer if I got my lazy *** out of bed on time but usually I get out of bed late and I drive 80 mph up the parkway to work. My job is about 70 miles from my house. No complaints about the mileage here

[Rockhound]

I don't really warm her up just like a minute or 2. It would be longer if I got my lazy *** out of bed on time...

Haha, so true.

[Vahagn23]

wuts an A/F alpha or w/e ?

[ALF]

I've been getting lousy MPG too. I have an 07 CVT, purchased July with 4300 miles. My current tank looks like it's only going to get about 200 miles on it! I was getting about 28 miles a few tanks ago. My mom, who has an 07 automatic, is also getting horrendos MPG.

What's the deal?

[bikeman]

I've been getting lousy MPG too. I have an 07 CVT, purchased July with 4300 miles. My current tank looks like it's only going to get about 200 miles on it! I was getting about 28 miles a few tanks ago. My mom, who has an 07 automatic, is also getting horrendos MPG.What's the deal?

Isn't Olney like continuous bumper to bumper traffic? To get good mileage the vehicle has to actually move. I'd expect my mileage to be cut in half if I had to move back to central MD.

David

[ALF]

Isn't Olney like continuous bumper to bumper traffic? To get good mileage the vehicle has to actually move. I'd expect my mileage to be cut in half if I had to move back to central MD.

David

Olney? No way. There's regular traffic but not bumper to bumper. Especially at the hours I commute. I'm going 50 till I get to my destination.

[bikeman]

I'm going 50 till I get to my destination.

At 50 mph, my Versa CVT will get approx. 35 mpg. Good luck with finding a solution. And let us know if you do find a solution.

David

[bdu]

Yeah, my CVT auto seems to be not doing so well either, regularly averages out to about 26-28 mpg on a tank. The vast majority of my driving is 20 freeway miles a day for my commute (and about 7 non freeway miles), so I'm not sure why it's so far off the estimates. I hit 2500 on the odometer yesterday, so it shouldn't be a matter of newness at this point.