Prius C Fuel :: Gas Mileage Decreased / Gasoline Engine Is Running A Lot
Nov 8, 2013
I used to get really good mileage on my 12.5 mile commute, if I didn't reach 50 miles per gallon, I considered it a poor commute. But over the last several hundred miles, I have only averaged about 45 miles per gallon - sometimes I'm not even reaching 40 mpg. I checked my tires, they are fine. I also notice that the gasoline engine is running a lot. I'll be at a stop sign, and the battery is nearly full, but the gas engine is running.
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I own a '90 Honda Accord and it constantly shakes, has poor acceleration and seems to use too much gas. I thought it was the catalytic converter and I installed a high flow cat. The fuel pump went out so I had that replaced. It shakes less since replacing the cat but I still see the gas gauge go down too low when I press on the gas and the car will stall and stop as I get to "E" when normally I was able to drive many miles past "E". Any guesses? I'm wondering if I need to replace the fuel pressure regulator.
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In the last 2 weeks I get 60MPG (indicated) with ease on my 22 mile round trip all city work commute. The commute is very predictable with the same speeds and driving technique and similar light pattern.
The thing is, the most part of the summer I had to work hard to get upper 50's on the same commute.
No, I don't use AC as the temps are mild enough to drive with windows down in early morning and evening.
There are 2 variables: the ambient temp went down to low 80's rather than high 80's before.
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I have a 2012 prius c with 72k miles. When i bought the car, it took a while for the fuel economy to increase. i drive 100 miles a day at 85mph and topped out at 52mpg. pretty damn good, if you ask me. im all interstate with very little city driving.
2 years later, its time to get new tires and ever since i changed them, my fuel economy has decreased to 45mpg.
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I have a 2011 Camry LE with about 13,000 miles on it. I just replaced my tires with Bridgestone Turanza EL400 225/65/16 and now my mileage have drastically decreased, I used to get about 400 miles per tank driving strictly city, but now I'm lucky if I can actually reach 300 miles driving under the same condition (non aggressive city driving). Does increasing the width of the tires actually make this big of a difference in mileage?
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I recently changed my stock '06 Passat to the optional 17" wheels & tires..
Before the switch I would get about 28mpg on the highway, but now I'm getting 25 no matter how much I lay off the throttle.. I know they're heavier, wider tires.
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In the past year or so mileage on my Honda Fit (08) has decreased at least 100 miles per tank full. Changed spark plugs, put in additive, changed air filter. Tires ok. I have 120,000 miles on it...
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Winter is over and summer is here. Will running with the AWD module unplugged increase fuel mileage? Will it do any harm to the drivetrain? (Assume matched tires, good alignment and suspension).
Signed, Looking to squeeze a buck anyway I can.
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I've had the car for 130k/2 yrs, and been very happy with it. Will definitely buy another. That said, I'm puzzled. Yesterday and today, after it had run for 10-20 minutes at surface-street speeds (so was warmed up), I got stuck at a lengthy traffic light and noticed a distinct smell of gasoline - not other cars' exhaust, but a fuel smell coming in on the blown air in the cabin. I have done no mechanical work on the car, or spilled gas into the glove box.
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We gave the Prius a good workout in the rain for the first time today. Central Florida has been having serious amounts of heavy rain, creating water covered roads in our area. Normally the digital fuel mileage display shows around 55 MPG for most of our driving. However today it dropped to the upper forties very quickly.
We were running the wipers on continuous (low and med speeds), the AC (defrost) was running to keep the condensation off the windows, and the headlights were on. I wonder if the extra resistance of the water on the road also had an effect on the fuel mileage.
Even though we hit some fairly deep water and created large amounts of splash, the car tracked straight, the brakes worked well, and the power was totally uninterrupted. Other than the poor fuel milage we were impressed.
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With my windows up I occasionally get a slight whiff or smell of gasoline with the engine running. Doesn't matter if A/C is on or off. I crawled all under the truck and can't see any fuel dripping. (2005 5.4)
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My 2000 Dodge Grand Caravan after many years of good gas mileage has become a guzzler. Has gone from 19 mpg to 10.2 mpg. Have had injectors cleaned, fuel system checked. What else can I have done? I really like this car.
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I have an '06 Subaru Forester (4 cyl, automatic) with about 97,000 miles on it. For the past 5 years I've had the car, it's been getting roughly 26-28 mpg on average. Within the past 3-4 months, though, the fuel economy has dramatically decreased. Now, I'm lucky if I get 21 mpg. (I used to be able to get almost 350 miles per tank, and now if I make it to 275 I'm jumping for joy!)
I took my car to the shop for the 90K service, and they didn't change the fuel filter as a part of that service. (They did replace the coolant, replace oil & filter, replace spark plugs, replace differential fluid front & rear, replace brake fluid, replace auto transaxle fluid, and then they did a bunch of inspections on belts, hoses, brakes, etc.)
I took the car back to the shop after this service so they could change the fuel filter, and they told me that because of the type of fuel filter I have, it should last the lifetime of the car. This sounded a little fishy to me, so is this true?
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why the engine keep running but no charging and no driving? the car was down hill, the battery was fully charged (green), I did not accelerate ( my foot was not on the paddle), but the engine sometimes keep running with a very low gas consumption. this become more often in winter, even when car stopped. I would like to know is this normal for Prius or there is any I can do to improve this?
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My '03 Tacoma Prerunner V6 has 116K miles and recently lit up its Check Engine light, returning a code for a failed up-stream air/fuel sensor. I recently drove across country, using many different fuel formulations ranging from CA gas to midwest ethanol to whatever they put in the gas here in the NY-NJ area (a mystery ingredient that seems to turn motorists irate and confuse their horn as a turn signal.)Anyway- age, or fuel, what killed the sensor? If fuel, will it happen again by time I get back west?
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I've had my XB 5-speed for nearly a year and 10000 miles. It as been dead on reliable and fun to drive. My gas mileage has varied from 26 to 31 in mixed driving and from 32 to 35 on the highway. I use premium fuel only because I can get it without ethanol. My fuel mileage also increased a couple of mpg due to getting the power robbing ethanol out. True it is probably not enough to offset the extra expense but I like not having the stuff in my car. My only dissatisfactions has been with the transmission gear ratios. They are way to low. This torquy engine could easily do with a ratio that would drop about 500 rpm for more relaxed highway cruising.
As it is, though, my XB will go up any hill or long grade without breathing hard! Another is the instrumentation. I don't mind the center mounted set-up but speedometer and trip meter for mpg ratings are both inaccurate. My speedo reads about 2.5 mph high and the fuel mileage read out has about the same error, also on the high side. I have the stock 16" tires. The clutch has a narrow engagement band and can be difficult to be smooth on. The car is fairly quiet, is comfortable and this years hot, humid summer has shown it has one of the best air conditioners I have ever experienced in a car. I thought it might be an electric unit rather than a belt driven compressor because there is absolutely no perceived drag when the compressor kicks on.
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Recently returned from trip from Austin Tx to Monroe LA. Gas mileage decreased from about 43.3 MPG to 38.5 MPG. A little annoyed by this but I guess I can attribute this to the increased weight in the vehicle. Still taking care in for other thing. Maintenance needed light came on & I assume it may be for a 15,000 mi checkup since it is nearing that mark.
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2011 Prius for wife. Mileage has always been upper 40s to low 50s until the last week or so, now she is seeing 35 mpg displayed.
I have asked for a check at fill up. I just pulled the car out to wash it and noticed the engine came on right away, same when I put it back into the garage. In the past we would get part way down the driveway before the engine came on. Also did a code check and no codes found
What are the approximate outside air temps? 40s am 70s pm.
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I've had my car going at 45 mpg the past 2 years. I just hit my 45k mileage mark. I drive mostly on the highway to work so getting 45 mpg is pretty good for me. This last few fill ups, I noticed my gas mileage has gone down to 40 mpg. I thought it was a mistake if it was just once but the last 7 fill ups has been that way. It just went down all of a sudden and has stayed that way.
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We have a garden variety 2007 basic Prius. That description will tell you that I'm no Mechanic. The mileage was between 40 and 43 MPG for years. Now it has suddenly dropped to 33 and 35. The average temp here in Florida is fairly consistent at above 60 F, so that is not it. Oil changed at the dealer, and not overfilled. Tires at the right pressure. Worn to perhaps 50% of their avg tread life. Also, I had the 12 Volt battery replaced at the dealer a few months ago, and no change. Is there a way to check?
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My 2012 Prius v (lowercase v) has about 80,000 miles on it, my work commute is 180 miles round trip daily. I had been getting 40-44 for about the first 18 months of owning/driving the exact same commute. In February I noticed when I filled the tank that the range showed around 370, which seemed odd, it was always over 400. I started tracking my mileage and it declined quickly. By mid-March I was getting a range of 320-340 with each fill up, and calculating MPG of 29-31. The dealer has had the vehicle for over a month now and can't find "anything wrong with it". Ummm, the MPG has dropped about 30%, isn't that something wrong?
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