I have a 2014 Nissan Sentra. Lately the miles I have been getting are depreciating rather quickly! When I first got the car, I got 400 miles on a full tank. Towards the end of November I was getting 260-290 and now for some reason I am getting 210 miles on a full tank and thats still using ECO! I purchased the car 9/1/14. It was brand new off the lot. I have no clue what could be happening. Some people are telling me to use a fuel injector cleaner and some are telling me not to. According to my dealership I am not due for an oil change until March, which to me seemed odd. I also have heard I may have bought bad gas. Does anyone have any advice?
Mine got 32 mpg city new and last fill up it got 27 I have had mine as long as you.my highway miles where about 43 and now I am lucky to get 40 that is going by gallons and not the computer. Also I have been using shell but I did by gas once at Kroger and thought it was magic gas cause car said I was getting 37 city turned out I was getting 26. It could be winter gas but from what I here it only makes a couple percent difference
I think the most I ever go was 360 that was on ten gallons of fuel with is all can get back in it when the light comes on. Was 400 all highway and how many miles do you have now?
The first fill up leaving th dealership was when I got the best miles on a full tank. Which was 393. I just hit 1800 on my car. I don't drive it on the highway, it's just mainly city. It's also showing I am getting 23.9 mpg.
I just bought my Sentra on December 11th, and had to put gas in it for the first time last Tuesday. Can't remember exact numbers, but, I think I got around 300 miles, all city driving. MPG Avg. said 30-31. I live in Arizona, so, I'm not sure if weather, or type of gas sold here, has anything to do with it.
I've heard you should give it 1000 miles or so to work out the kinks and settle in for the best results. Maybe Nissa is still settling in to her new surroundings? :grin
Lol you are still getting way more than me! I think we have different types of gas here than there. I have an appointment at my local dealership for them to take a look at my car.
keep us posted there is no way a fuel could half your mileage.
and if it was that rich you would smell it.
it must be dumping some for the nissans that went to the crusher lol. on other forums. and treads in this forum i have read similar gas mileage problems and that bothers me. how much has your driving changed? where you going easy at first and maybe do not notice you got a little harder on it? o and you say you use eco turn it off for jumping out in traffic it causes a little ecceleration lag
Honestly, my driving hasn't changed and I have drove the car the same way I did when I first bought it. I took it down to be looked at, and they told me there is nothing wrong with my car and they advise me to bring it back when the car is near E instead of on full to run more tests on it. But even driving it, the mileage jumps around drastically! My father drove my car to see if he could figure something out and when he got in the car said 206 miles to empty on FULL and just going around the block it says 220 on full. I am starting to think there's an electrical problem because my 2012 Hyundai Sonata gets 500 miles on full. I tried to explain this to my dealership and they just ignored it.
There is a user called throckmorton who keeps trolling my threads and post about taking my car to a dealership about issues and that they are there for me lol . 6 out of 6 times I have been they do nothing so do what I started doing and ask for a service receipt saying what you came in for. I plan on trying high octane regardless what the car calls for. the knock sensor will sense the smallest knock and retard the timing that will show a major decrease in mileage . maybe you do get bad gas try a different station you will get more miles per dollar even if there is a large price difference I have had cars that get more miles per dollar with high octane regardless that they were ok to run on low. also if you do switch I do not know if this computer needs a reset or not to get out of timing it is running or not and I wonder if cars from dealerships have high octane since they need it for some cars and it would cost them more to have more than one storage tank. keep me posted I will let you know what happens if I switch but I have a full tank now.
I know most car "experts" say that running regular 87 octane won't harm your engine and it saves you money in the long run. But, I've been debating using 89 octane on a regular basis (with a 91 fill-up occasionally). Especially, since gas prices have been reasonably low. (Down to $2.19/gal. here in Tucson!)
Has anyone else done this with they're Sentra, and is there any benefit to it?
There has been a long discussion on this in the Altima forum.
Whenever conditions are prime for engine knock, I fill with 89 AKI if all of these are present: Fully loaded road trips in the dead of summer in the south. Of course the knock sensor will retard the timing to prevent knock but it'll rob you of some HP.
But 91 AKI is too much or will not benefit an engine designed to run with 87 AKI, why? Because I once have an experience with my old GA14DE engine that I've tried filling with 100 RON (about 94-95 AKI) fuel without putting the ignition timing in advance. I started to loose some power, black smoke, fouled plugs.
I then researched on the subject and turns out (contrary to common belief), high octane fuels are harder to ignite, thus high compression engines and engines with advanced timing benefits from it because they're prone to preignition. When I switch back to 92 RON (87 AKI), the problems went away, the sparkplugs even cleared themselves.
I'm sure our modern MRA8DE engines will be able able to efficiently burn 94 AKI, but performance gain from it? No way, unless you tune the ECU for high octane fuel and advance the ignition timing.
What engine do you guys have in this Sentra.....1.6, 1.8, or a 2.0. I ask, honestly because I dont know. Alot of things effect actual gas mileage, the most obvious is driving style....Richard Petty or grandma. Next comes the mechanical aspect, fouled/defective components. i.e. Fuel injectors, O2 sensors, catalytic converter etc.
Ok, so listen for noise with this engine. Nissan has had issues with the 1.8L, specifically with piston slap. Noise begins with a light tapping on start up and gradually goes away as the engine warms up, however as the engine wears, it gets worse and lasts longer til its always present. It is a defect with the casting of the block. I know because my wife's old car, 2010 Versa had the engine replaced twice. Once at 36,000 miles and again at 72,000. But back to the point, bad fuel economy is as I stated in my previous post.
From what I've read from the net, the B17 Sentra's 1.8 L MRA18DE engine is quite different from the old MR18DE/MR20DE engines. But who knows what new set of problems will arise with it.
Ok so back on topic...Best advice I can offer anyone is to google around your location for gas stations that still sell REAL gas. This ethanol stuff is crap for ANY engine. If your able to find and regularly use gas with ZERO ethanol added you will notice a better running car, and your car in return will thank you by providing you with more reliability.
I just traded my 2014 Sentra in but I can tell you mine did the same thing. I would only get 34MPG on highway and 23 in town on average. Over the summer I made a 1200 mile round trip and the best I got was, and very few would believe it was 45MPG had calculated and that was a 60 degree day, windows up, 65MPG cruise on with just the vents and no AC.
My driving is usually about 80/20 with 80% highway and the last couple months I was only getting around 260 per tank.
Lord, I can't wait to trade mine in this Spring. At best I get 32.5 in the summer, 90% highway in the NORTHEAST, not like most of the members on this forum who live in very warm climates and get like 36 and above on highway.
Just filled up for the first time yesterday. I got 340 to the tank. Would have got more if I did more highway. Took a road trip from the dealer and the computer trip was reading 38-39 mpg. I was using ECO mode every time I got in but noticed it pulled really slowly from stop. Just used Sport when merging on freeways in California.
OK I have noticed just trying to pass a few people , sit at a light or look for parking makes the mileage go down fast. I have got 30 mpg city before. So here is my last fill up computer said 33.1 real mileage was 29.68. That was shell 87 octane in Dallas. I now filled up with 8 gallons of 89 to 2 gallons 87 cause that is what was in the tank according to the fact I can only get a pinch above 10 in it. That was at same shell I will try to keep y'all posted.
OK I have noticed just trying to pass a few people , sit at a light or look for parking makes the mileage go down fast. I have got 30 mpg city before. So here is my last fill up computer said 33.1 real mileage was 29.68. That was shell 87 octane in Dallas. I now filled up with 8 gallons of 89 to 2 gallons 87 cause that is what was in the tank according to the fact I can only get a pinch above 10 in it. That was at same shell I will try to keep y'all posted.
That last top of with 89 octane made a difference I thought I drove it slightly harder and got 35.42 miles per gallon all city the computer said 32.9. Yup you read that right. I would like to know what it would have done on the highway. maybe 91 could do better ????? So now I will still by the gas that gives most miles per dollar. This engine is almost 10 to 1 compression the manual says 87 is the minimum.
yea the computer is def weird. I drove my car till the low fuel indicator was flashing and then showed dashes. Ever since my car never went above 32mpg...even on the highway cruising at 60mph. I thought this can't be right and reset the computer...now it's showing strong numbers.
I would recommend restarting the computer after every fill up to keep it accurate too. Just hold down the trip computer button on the steering wheel for a few seconds on the MPG screen.
I don't use A/C and Im averaging a good 33mpg in the city according to the computer. My next fill up I will calculate by hand and see how much it is off by.
I ran my tank till the light came on and filled up with a name brand name 89 octane. When I refilled it I got 43 mpg.computer said 36.6 city . it is cheaper to buy midgrade since 87 gets 15.87 miles per dollar and 89 is getting 20.09 miles per dollar at current price. I am getting 13 more miles mpg with the 89 wow that is a 43.33 percent increase in my city fuel mileage. I would like the hear what it dose for you I have tried it and did the math already. Fuel is from shell in Dallas tx.:smile
I ran my tank till the light came on and filled up with a name brand name 89 octane. When I refilled it I got 43 mpg.computer said 36.6 city . it is cheaper to buy midgrade since 87 gets 15.87 miles per dollar and 89 is getting 20.09 miles per dollar at current price. I am getting 13 more miles mpg with the 89 wow that is a 43.33 percent increase in my city fuel mileage. I would like the hear what it dose for you I have tried it and did the math already. Fuel is from shell in Dallas tx.:smile
Sure you are...you are claiming that you get a 43.33% increase in your city MPG by using 89 octane vs. 87 octane. It does make me wonder why Nissan didn't think of doing the same thing as you did, so they could make the claim of 43.33% better fuel economy.
I find this impossible to believe....but the again, at one time or another in my life, I believed in The Tooth Fairy, The Easter Bunny, and Santa Clause.
I will try Shell 89 next. 76 regular is crap. I always use Exxon but found 76 to be about 30 cents cheaper in my neighborhood. I put 1/2 a tank of 76l regular and my mpg went from a steady 33 to about 25-28. That was an instant drop after driving off the gas station lol.
But with the price difference 76 midgrade is cheaper than Exxon regular so I will try that next time. Thanks for the numbers
I am surprised at the fuel quality from one place to the next. Shell here may not be the same as where you are and the fuel could be different next time I fuel up. You can not go by you computer the only way to test this is to have your tank empty as possible. fill it at the pump and at the end fill it slowly till you can not get any more in it then reset your trip meter. You do not have to burn the whole tank to get a good reading you just need to park at the same angle at same pump and fill it the same way. Divide miles by gallons added for mpg. You need to drive the same way you have been for accuracy. I do this with different cars so I can buy the fuel that gets most miles per dollar. I try to tell people this and they never seem to believe me. Someone who buys the cheapest is more than likely paying more for gas than they would if (they would pay more for gas) lol . I would have done this sooner but I do not drive this car every day. I would like to try 91 or 93 but maybe someone else could try that for us that drives more miles. people that say octane makes no difference have no idea what they are talking about and that is what I see more than anything on the net. O and it seems my foot pedal inacator stays more in the green and shifts to the next gearing mode sooner more smoothly.
I am surprised at the fuel quality from one place to the next. Shell here may not be the same as where you are and the fuel could be different next time I fuel up. You can not go by you computer the only way to test this is to have your tank empty as possible. fill it at the pump and at the end fill it slowly till you can not get any more in it then reset your trip meter. You do not have to burn the whole tank to get a good reading you just need to park at the same angle at same pump and fill it the same way. Divide miles by gallons added for mpg. You need to drive the same way you have been for accuracy. I do this with different cars so I can buy the fuel that gets most miles per dollar. I try to tell people this and they never seem to believe me. Someone who buys the cheapest is more than likely paying more for gas than they would if (they would pay more for gas) lol . I would have done this sooner but I do not drive this car every day. I would like to try 91 or 93 but maybe someone else could try that for us that drives more miles. people that say octane makes no difference have no idea what they are talking about and that is what I see more than anything on the net. O and it seems my foot pedal inacator stays more in the green and shifts to the next gearing mode sooner more smoothly.
Count me as another person who never seems to believe you. “People that say octane makes no difference have no idea what they are talking about…”
I guess that you, with your highly scientific and easily verifiable gas mileage testing, are to be believed over the United States Department of Energy, U.S Environmental Protection Agency, and their website Fuel Economy and the United States Federal Trade Commission.
From the Gov't websites:
Using premium fuel improves fuel economy?
Unless your vehicle was specifically designed for premium fuel or knocks severly with regular fuel, you will probably experience no benefit from using premium fuel over regular. Consult your owner's manual to see whether premium is recommended and under what conditions (e.g., towing). Top Ten Lists
Unless your engine is knocking, buying higher octane gasoline is a waste of money. Premium gas costs 15 to 20 cents per gallon more than regular. That can add up to $100 or more a year in extra costs. Studies indicate that altogether, drivers may be spending hundreds of millions of dollars each year for higher octane gas than they need.
It may seem like buying higher octane “premium” gas is like giving your car a treat, or boosting its performance. But take note: the recommended gasoline for most cars is regular octane. In fact, in most cases, using a higher octane gasoline than your owner's manual recommends offers absolutely no benefit. It won't make your car perform better, go faster, get better mileage, or run cleaner. Your best bet: listen to your owner's manual.
The only time you might need to switch to a higher octane level is if your car engine knocks when you use the recommended fuel. This happens to a small percentage of cars.
How can you tell if you're using the right octane level? Listen to your car's engine. If it doesn't knock when you use the recommended octane, you're using the right grade of gasoline.
Should you ever switch to a higher octane gasoline?
A few car engines may knock or ping even if you use the recommended octane. If this happens, try switching to the next highest octane grade. In many cases, switching to the mid-grade or premium-grade gasoline will eliminate the knock. If the knocking or pinging continues after one or two fill-ups, you may need a tune-up or some other repair. After that work is done, go back to the lowest octane grade at which your engine runs without knocking
Throckmorton
1 if you read and understood what you posted that would be a surprise
2 the knock sensor detects inaudible knocking you should never here it
3 Alexis has not been back to her thread probably cause of you
4 if you did your research you would find people claiming to be getting over 50 mpg
5 the internet is not going to come over and work on your car for you. So just cause it is
On the internet dose not mean that it is helpful. Your comments for example.
6 there are people who want to help each other on here. We found this site so I am sure
We can find one with sarcastic jokes and comments.
7 who are you to try and tell us all not to try to get better gas mileage.
8. If changing octane possibly could add a extra130 mile range to a tank I can assure
You throck anyone with a new sentra would love to here about it!
Throckmorton
I do not think you are getting it are you really so arrogant and narsasistic ???? Who are you defending? What are you fighting for? You seem to be on a crusade with the mentality of a terrorist!!!!!!! This forum is for sharing knowledge . I have shared my real world numbers with the other truth and answer seekers like myself and all you do is post things you find on the net and make comments you get out of your seat. Anyone reading these forums I am sure know you are not only full of yourself but are full in general of (it).
“I do not think you are getting it” Oh, I get it alright.
“are you really so arrogant and narsasistic ???? If you think so, I am. Of course, since ‘narcissistic’ is not a word found in a dictionary, I don’t know if I am or not.
“Who are you defending? I am defending factual, truthful information….something that you seem to have no understanding of. It is one thing to post your opinion on something, I.e., “I think my car looks better debadged”, or “I like they way my car looks with these wheels” however, when outlandish, absurd, and unverifiable claims of “I am getting 13 more miles mpg with the 89 wow that is a 43.33 percent increase in my city fuel mileage.” I am compelled to respond…and respond with facts.
“This forum is for sharing knowledge.” I agree 100% with you on this one. Knowledge is one thing, incorrect opinion stated as factual information is another thing. It does no one any good when non-factual information is posted on Forums.
“I have shared my real world numbers with the other truth and answer seekers like myself and all you do is post things you find on the net and make comments you get out of your seat.” Your massive fuel economy gain was obtained how? You said “I ran my tank till the light came on and filled up with a name brand name 89 octane. When I refilled it I got 43 mpg. computer said 36.6 city . it is cheaper to buy midgrade since 87 gets 15.87 miles per dollar and 89 is getting 20.09 miles per dollar at current price.” You are basing your unbelievable fuel mileage off of one tank of 89 octane gasoline. Not a very scientific test.
Have you noticed that in my postings I always provide links to what I post? You are wanting us to believe you over the Government testing agencies, car magazine testing, and consumer groups testing. Sorry.
I’ll leave with this final thought. With all car manufactures trying to crack the CAFÉ nut, and doing anything possible to increase overall fuel mileage, why didn’t Nissan recommend 89 octane for the 2013 Sentra IF 89 octane gave 43.33% better fuel economy? I wait with baited breath for your explanation on this one.
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