Subaru - Forester :: Fuel Economy Has Dramatically Decreased
Jan 3, 2012
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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I have a 2002 Subaru Impreza 2.5 RS with about 151,000 miles on it. And it's an auto. I recently took it to about 5.3K rpms on a stretch and it occurred to me that I might be pushing the engine a little too hard. My oil was all fine, and the engine was plenty warm, I had been driving for about 10 minutes but still. I also don't do this too much maybe like 1-2 times/month but I sort of get paranoid about these things.
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My 2001 L.L.Bean Edition H6-3.0 is losing power & MPG on the fwy. Sometimes it will feel like something is holding it back or dragging. I've checked the brake calipers and they're not sticking, changed the air filter, oil & filter, transmission fluid, and still cannot find the problem. I've overfilled the gas tank and read this can damage the charcoal canister. Will a saturated charcoal canister cause a drop in power and MPG? What should I check out next?
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Okay, I've been trying to diagnose this problem for ages. Whenever I top off my tank with fuel, the garage smells of fuel until I use up about a quarter of the tank. The smell stays mostly outside of the car. So far I have replaced the drain filter (a few years ago), fuel filler neck, hose leading from the filler neck to the tank, and had the system pressure tested. I'm fairly certain it's not the tank because the car has been undercoated since new and my mechanic saw no signs of a leak when he replaced the rear crossmember recently. My next guess is either the gas cap, the charcoal filter, or some hose leading to/from the charcoal filter.
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Having problem with an exhaust or fuel smell in the cab? i have had the exhaust checked & the seal on the back door, all have been fine. it has only happened in the really, really cold weather.
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I have a 2006 Prius with 165K miles. My MPG suddenly went down 20% (47 to 38). Tires are fully inflated. I did change to high-mileage oil at last service, could this be the cause?
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Just traded in a 2012 Nissan Sentra SR on a 2013 Hyundai Santa Fe Sport and have a question about the gas mileage.
My Sentra always read 28+ MPG, but it was a known issue that the reading was almost exactly 3 MPG off; thus, I was hitting about 25 MPG most of the time. I could typically get by for a week and a half, sometimes two on a single tank (which was about 11 gallons).
I took the Santa Fe home on Thursday night, filled up from the dealer and reading a range of 384 MTE. As of tonight (Saturday), my fuel meter is reading two notches over the halfway mark and the range has dropped to 232 MTE. I haven't driven anywhere near 150 miles since Thursday, FYI.
The MPG on the Santa Fe started t a measly 12 MPG when I left the lot, most likely due to sitting and idling and lots of stop-and-go driving on test drives. I've since managed to get it up to 22.2 MPG (and feel confident it should eventually read about 25 MPG, about the same as my Sentra). Even though the MPG reading is going up, I feel like I'm going to be filling up the tank again without hitting a full week of driving (and this is a bigger tank than the Sentra). I'm not getting the difference. Is there an issue that I'm missing here? After checking in with the dealer that the previous owners used for service to ensure there were no red flags, they did tell me that it had an active bulletin for a software update. I've read in other places here that this update can have some effect on the MPG. Any thought on if these things are connected?
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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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Every time I turn the car on, the "from start" fuel economy reading resets to 15l/100k. After driving for a while it goes down to 4l/100k but then resets back to 15 once the car is turned off. Is there any way to get it to stay at what it finished at?
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While most of the emphasis I've seen on improving fuel economy seems to focus on warming the car up quickly in cool/cold weather, I seem to be experiencing significant mpg drops at the other end of the spectrum.
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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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I am wondering about how fast to accelerate for maximizing fuel economy. I understand with the P&G approach that you don't want to get up to speed too slowly. The question is whether it really is more efficient to go ahead and get up to speed or stay within the ECO guidelines? In particular, I find that getting up to highway speed especially that it can take quite a while to get up to 70 mph without having it going into the power range. It seems like it is better to get up to speed and then back off to go to the high efficiency mode.
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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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Wondering what could cause an increase in fuel economy. My GTI has been running at 29 +/- MPG since the day I bought it, but no higher than 30. I took it out for a ride on Sunday after I changed the front brakes Saturday. The dash tells me it's running at 34. So I filled it up and manually clocked it on a 50 mile trip. I refilled at the exact same pump - just to remove any error. And what I calculated is that the computer is right.
There is no loss of power. However, I've been fighting intermittent misfires on cyl #1 and #2. the misfire on #1 has all but gone away after finding out the coil wasn't sitting right and the spark had loosened up. I've tracked #2 down to either the injector or carbon. I'll be taking care of that next weekend.
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I have the 3.6 and it has been great on fuel economy up until last week. I was averaging about 26mpg and getting near 20 mpg around town. Now my fuel economy has dropped to 15mpg city and 25mpg highway putting the overall MPG down to around 20. What happened? Did I get a bad tank of fuel or is it time for new spark plugs? The car has 34k on it; and when I checked the plugs at 28k they looked like new and gapped to within .002 of the spec.
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I have a 2013 Prius V and my mpg averaged about 43. Now after about 13,000 miles it has gone down some to more like 41-42 and even 39. Once on a mostly highway trip it was down to about 34. Last summer it got 51 mpg in Colorado!
How to get better mileage. I once heard about a feathering technique with the accelerator but I don't know if I understand it.
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I have a 92 Dodge Spirit 2.5L non turbo. I have been getting horrible fuel mileage. Around 17. I have given it a full tune up, including replaced the distributor and hall effect sensor. Why my fuel economy is shot?
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Curious? Looking for if the generation 4 Prius' has less road noise and better acceleration?
My generation 3 is quite noisy inside.
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Have not purchased a Prius yet as I have a TDI awaiting results of the lawsuit. I am wondering over the last week or so, Vegas has been really hot. Just wondering how the new battery and the MPG is holding up in the Vegas heat.
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Ok, so I was already getting pretty bad fuel economy from my 3.6 4motion wagon (14/24 city/highway). so last week I take it in to the dealer for 5k oil service. now after the service I get 10/18 (city/highway)!!!!
Car seems to run fine, but for some reason the fuel economy has dropped significantly. Most people on here say they get better economy after the 5k service.
Now the car is at the dealer for a few days for them to check it out. Gave me a old hyundai for a loaner.
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