Prius (2010-12) Fuel :: Crazy Noise Plus Sudden Drop In MPGs
Nov 11, 2012
First time Prius owner Aug 2012. First 2 tanks of gas very impressed at 50-51 mpg. Then going slowly (10mph) through a parking lot I heard a strange noise on passenger side underneath the car. The best description is that it sounded like a steel lawn rake being dragged under the car on the asphalt. It lasted for about 30 seconds, then quiet and I have not heard it since. No sign of issues. No dash warning lights.
My next tanks rendered 47.5, 48.5, 46.5, 45.75 mpg. Then in the last 2 tanks suddenly at 41.5 and 42.75 mpg. This seems like a very major drop in mpg. I have been reading the comments regarding outside temp etc. and I will make adjustments. It just seems extreme and the "noise" is now making me wonder if some electrical component failed and is adding to the poor mileage issue.
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I commuted to LA 2-3x a week. The mileage on my car is now at 90k. I have had an average of 40 mpg since new, but suddenly it began to drop. We took it to our local Toyota dealer and was told it was most likely a cable that needed to be cleaned. That was $160. It didn't work.
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I am using a 2012 Prius and I was running around 23KMpL average. For sometime I am seeing my mileage around 17 - 18 KMpL. What could be the reasons for this ?
The only change happened in between is that I had a accident which I had to replace the front buffer.
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I have a 2008 prius. Usually it gets me around 52-55mpg, I've had it since January. Since a couple of days ago its not giving me anything above 49. I know thats a normal number, but considering the fact that its usually quite a bit higher I'm wondering what the cause of the drop is. Also around the same time, when I pull out of my driveway I notice what appears to be a bit of water leakage. Its under the vehicle in the front center, and it only happens when I start the car for the day and pull out of my driveway (its on an incline).
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So yesterday, I reset my trip meter when I put on gas. I did a 7 mile drive home (no highways) MPG was around 54. This morning, my husband pulls the car from the garage to the driveway to install my name plates. When I start the car, I noticed MPG was 41. What could have caused the sudden overnight shift from 54 to 41. I only drove 3 miles to work since then so it is hovering around 42. Could the cold morning start to back up from garage did something? Could he have left the power switch on (and it shut off automatically).
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Here in the northwest the weather has been dry and temps in the 40's to over 60 degrees. The mpg's have increased about 5-7 mpg over just a month ago.
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My average mileage down to 36MPG this week. is there something wrong with my car? never really went as far as 50mpg the best I got was 45mpg. my average is 40mpg.
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Winter temps are dropping my mpgs from 51-53 mpg to the 44-47 mpg range. Snow, rain, slush puts drag on the car, as well as temps in the 20-40s causing the ICE to run more during warmup and during the 15 mile trip I make daily. Also mpgs in town on 1-3 mile trips are dropping into 29-33 mpg range. I guess the Prius isn't made to thrive in cold temps. I don't know if there is much I can do about it. I did remember to raise the pressures in my tires which has dropped also.
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I bought my 2007 Prius in July 2010 with 70k on it. To date it has 78k.
During the summer months I was in Colorado and achieving anywhere between 400-450 miles to the tank.
In August I returned to the Mid-West, running well and achieving the same mileage, but as winter has come along, it is now getting about 300-350 miles to the tank, but has gotten as low as 240.
The brakes have seemed to become more sensitive, and the car seems to rattle more when I come to a stop.
Are these just symptoms, especially LOWER MILES PER TANK caused by the cold Mid-West winter?????
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My wife and I were driving around town the other day. While merging onto the highway we hit a nail. I put the donut on and went to TiresPlus where I have gone since I started driving. I had been thinking about replacing the front tires due to wear and the nail wen in the side on the rear. Anyway I purchased 4 Firestone Affinity Touring tires and went on about my day. My wife drives 100 highway miles a day and then does some city driving. This week she has lost about 5mpg's according to the display average. Also the service light has come on. Can this all be tire related?
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I bought a 2010 Prius II (150,000 miles on it) about two weeks ago. In that time the car has been averaging between 41 and 43 MPG according to the computer, and I calculated 41.3 MPG at my last fill up. I am concerned about the MPGs. I bought a brand new Prius in 2012, it was a III model and '12 year. That car always got 48 highway, and 50 in the city. From what I understand, the 2010 and 2012 models have the same engine and transmission set up and the only difference may be the software.
So my questions are; why am I getting 7 to 9 MPG less than my old (newer) 2012 Prius? What to do to get better mileage, but what actually worked? My checklist of repairs include; check 12v battery, change out spark plugs, just changed air filter, check brakes, oil change (using Mobil 1 full synthetic 0w-20), what else should I check/replace/update,
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It seems that my mpg gauge always drops by at least 2 mpg when it's raining, even if one goes slower because of the rain. Why is this?
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Last October I needed new tires, so I had Michelin Defenders put on my 2011 Three in place of the OEM Firestones. The Michelins perform well and are nice and quiet, but...
My gas mileage (both indicated on the dash and calculated) has dropped by about ten percent. In researching the two brands of tire, I found that the OEM Firestones are rated at 836 revolutions per mile, and the Michelins are 839. I'm wondering if this is the reason for the apparent change in mileage.
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Fall and Winter musing about fuel efficiency...warming up the engine and thermal efficiency of the Prius
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Our 2007 Prius had previously been averaging high 40s MPG but the past few weeks has dropped to around 38 and won't move much higher... we are using the A/C a little more than the past few months but not on full constantly or anything like that... first time I've seen MPG this low since we've owned the car (20 months).
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I've got a noise in the front end of my GLS (52K miles). It's kind of hard to make it happen, but I hear it 2-3 times a day. It doesn't usually happen hitting a bump, but is usually heard when the weight of the vehicle shifts, when there's a sudden incline or drop, like when pulling into a driveway or gas station.
I had a car with a motor mount issue once, which sounded similar. However, I actually had my motor swapped 5K ago, and my noise existed before that.
I have to get to the dealer (I believe 60K is the end of coverage for this kind of thing). I would like to have a little more info or suggestion of what to check, otherwise it will be "we don't hear anything."
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I was driving up a hill today at about 30 mph with .9 miles remaining showing on my EV battery meter when all of a sudden it drops to 0 EV miles remaining and shows only 2 of the battery level bars (which is very very low), and the engine of course turns on. What happened?
I promise I did not push the EV power bar over its threshold. I monitor that like a hawk. I also know for a fact that it jumped from .9 to 0, because I watch that part like a hawk. This part of the trip is near the end of my drive home and I've done it about 50 times so far with no issues. With .9 miles left at that point on the hill I have always been able to make it to my driveway with .4 or .5 remaining, so this is very odd.
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My '05 Prius has been going strong with just passing the 200k mark recently. However about 2-3 weeks ago after I replaced the PCV valve, I started getting really bad gas mileage. I'm talking about getting an average of 45 mpg in city/highway combo down to 30 mpg. Filled up my tank twice from empty so I'm pretty sure it's not just bad gas. Highway driving does slightly better than city.
Today I noticed that my acceleration from stop is just absolutely terrible. The car responds really slow and sluggish and takes a while for it to realize I want to go. Low speed doesn't get good mileage at all. It seems I get normal mileage at almost 65 mph, not sure why.
I don't think the 100 degree weather we are having here in Texas is causing THAT much of an effect because last year and two years ago during 100 degrees, gas mileage was normal. What to check? I searched and most talk about cold weather. I have a relatively new 12V gel battery so I doubt it is that but I can try disconnecting it.
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Im noticing my mpg dropping in the past couple of months. I usually get 19 or 20 in town, and up to 23 on the highway. Now im lucking if I get 16 or 17mpg.
I have a 2001 escape XLT. 6cyl 4x4.
I changed the spark plugs, coils and fuel filter about 3 years ago (almost 40k miles ago).
The car starts fine, seems to idle fine, seems to accelerate ok. The only thing that is off is the MPG.
I dont just want to throw money at parts. Which one should I replace?
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Our 2012 Tiguan (FWD) has been experiencing a sudden drop in MPG for the past two weeks. We had no significant change in climate or driving habits. With mixed driving, we dropped from about 24 MPG to 20 MPG. We had our 40K service done just two weeks ago.
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I have an 08 2.0T and it just suddenly had a huge drop in gas mileage. I recently had new tires put on and an oil change (about 35k miles). getting closer to 40k miles now and wondering what could be causing this. Usually I get about 30-33 mpg easy on the highway. Now I'm getting 24-26 mpg. Already checked the tire pressures. they're to spec. no gas leaks from what i can see.
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