Is this not pure insanity based on lack of knowledge and information? Synthetic oil IS NOT an oil that requires to be serviced every 4,500 miles. That is pure hogwash. Synthetic motor oil do not degrade like mineral motor oils and even these last six moths/6,000 miles. Next, there is no such thing as "mpg." This is an acronym for "miles per gallon," ans needs to be capitalized. MPG is correct. MPH is correct. Washington, DC is correct. Next, is warranty. This car has a warranty. If you have any concerns as to the mechanical state of the car, return the vehicle to the dealership. Next is capitalization. Proper names must be capitalized. Honda is correct. "honda" is NOT. Civic is correct. "civic" is NOT. Punctuation. OMG why do teens do not punctuate the last sentence of what they write? This is BASIC English grammar rules. You have asked a question but failed to place a question mark at the end? If you must follow "rules" why not follow the correct ones? How old are you? Sixteen years old? How do you know the car is "losing MPG's ?" What is your data? The car's computer? Do you know how this data is gathered? Just based on how you write and what you are doing with this car indicates not much knowledge as to cars. From the bad grammar to the synthetic oil service to the overall impression, you have not spoken with adults, mechanics or anyone as to this Honda Civic and you prefer to text invisible strangers. How tragic is that because you think this is all normal and "standard." Well, sorry, it is not . There is plenty of information as to what affects MPG performance online. I suggest you use Google to locate the information. One of the largest factors in fuel waste is speed. The faster the car goes the more gasoline it needs. Basic physics. Start there. STOP wasting money on oil changes not needed. The majority of automakers today call for oil changes at either 7,500 or 10,000 miles, and the interval can go as high as 15,000 miles in some cars. Yet this wasteful cycle continues largely because the automotive service industry, while fully aware of the technological advances, continues to preach the 3,000-mile gospel as a way to keep the service bays busy. As a result, even the most cautious owners are dumping their engine oil twice as often as their service manuals recommend. I use synthetic blend motor oil. My 2001 Audi TT Roadster with 93,000 miles has been serviced every six moths or 6,000 miles and the engine is clean inside, clean outside, does not use oil between changes, does not leak oil. Synthetic blend is cheaper than synthetic and works excellently. I have no idea if you are paying for these oil changes or how much. But you are not in the know as to this subject. I suspect you are 16 years old and have a lot to learn. A lot. You best start digging.
EDIT UP FRONT: Two weeks ago you were 22 years old and seven months ago you were 23. Looking at all your questions reveals that you're not serious about the things you ask. You merely like being heard.
Sad. Sad.
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My wife's car can get 30 mpg highway but she regularly gets around 23. Why? Because she thinks the gas and brake pedals are light switches. She hammers the gas until she has to slam the brake pedal. I hate when she drives. She's brutal on cars. When I drive I accelerate easy and come up to speed and back off the gas enough to hold the speed. When approaching a light she will gas all the way up to it then hit the brakes. Me? I'll take my foot off the gas long before I need to step on the brakes. Driving habits make a huge difference. Her Toyota Celica (before she wrecked it) had some issues with engine performance. When fixed the car was much more "Zippy" to quote her. And she drove it like a missile. Got worse mileage and complained. But when I tried to teach her to drive with a lighter foot she argued with me saying she's been driving over 40 years and that she "KNOWS" how to drive.
There's more to it than gas, brakes and steering. That's why she wrecked it.
One answer ahead of mine suggests checking tire pressure. And yes, that can have a huge affect on mileage. Softer tires drag more. Harder tires (inflated) roll much easier. Don't believe me? Get on your bike and let half the air out. Then try to pedal. Takes lots more effort AND when you coast you don't coast nearly as far. Same is true with your cars tires. If they're under inflated then you're going to get poor mileage.
Your car is too new to be having mechanical issues. However, it's not impossible that you have something wrong from the factory. It happens. And there's such a thing as "Latent defects", which don't appear immediately. They manifest themselves after a period of time. Sometimes they show up in a few months, other times they don't show up for years. It all depends on the extent of the latent defect.
I wouldn't expect your air filter could be a problem either. Too new. But if you've been driving through some construction areas or in other dusty environments then your air filter can begin to clog; which can lead to diminished MPG.
Start simple. If the problem doesn't reveal itself then have it checked at one of those free inspection places. My area I always to to Les Schwab for help. You may even have a sticking emergency brake cable. Have you noticed any burning smells lately?
One last thing comes to mind: Cheap gas. If you get cheap gas it doesn't perform as well. And cheap gas can lead to deposits on the valves, which reduce airflow and power. With less power you step more on the gas pedal. And MPG goes down.
If you got better mileage when driving on the highway and are now doing more driving on the surface streets you WILL notice a change in mileage. All that stop and go wastes gas. Highway driving requires the same amount of gas to get the car rolling, but once rolling it takes little to maintain the speed. The faster you drive the more wind resistance you encounter - and that too reduces MPG. Even in areas where the speed limit is posted at 80 I rarely do more than 75.
Here's why: If you're traveling at 40 MPH you're encountering X wind resistance. When you go 80 MPH you encounter 4X wind resistance. YES, FOUR TIMES MORE RESISTANCE. Inverse square law! Physics! All that fun stuff you hated so much in school. So if you're still doing highway driving but are going faster you are burning more fuel because of exponentially increased wind resistance. That's one of the main reasons big trucks seldom go over 65. The savings in fuel for trucks nationally are in the millions of dollars in savings - all by slowing down from 75 to 65.
Your little car? I don't think you'll see that much a difference between 65 & 75, but the fact is going faster wastes more fuel.
So is your car REALLY seeing a problem? Or is it accountable to a change in driving habits? On my truck I installed a vacuum gauge. I can watch how hard I'm pushing on the gas pedal. If I drop the vacuum too low when I'm pushing too much on the pedal. I still accelerate, but just a little less rapidly. Has changed my mileage from a low of 18.52 MPG to 20.55 MPG. And yes, I keep records of my mileage. It helps to know how the vehicle is running, and can alert me to any trends.
Hope this helps.
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as stated it can be your driving habit's... you have got more use to the car now so probably driving a lil different and not realizing it. when you first get a vehicle its new and your very easy and cautious with it. it can also depend on the gas it had in it, maybe they had premium to make it appear better gas mileage but you might be running normal low octane gas... you could check the spark plugs and make sure the air cleaner is clean as it should be..... make sure your tire pressure is all okay. don't do a lot of gas wasting.. don't let it idle along time but at the same time don't shut it off if u plan to start it back up in 5 minutes cause it takes more gas to start it back up than to leave it running for those few minutes... its always good to consult a dealer since its on warranty id hope and tell them the mileage went down some... doubt they will do much for you.
I know that often depends on where you drive. I've heard more streets with stop lights will do that
I have 2013 honda civic why does it give me less mpg than before.. I use to get 26-27mpg and now only 23mpg why if it's only 6 months old the car I've done 2 oil change only every 4500 miles since it uses synthetic oil and recently did tire rotation.. How can I improve or should I take it to the dealer and fix it
