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Subaru Legacy/Outback: MPG-Real World Numbers

98 messages,  Last post on Jul 29, 2009 at 7:46 AM

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What is this discussion about? Subaru Outback, Fuel Efficiency (MPG), Sedan, Wagon

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#49 of 98 Re: Sudden drop in mpg [hypov] by jfl Sep 21, 2007 (9:19 pm)
Replying to: hypov (Aug 18, 2007 6:59 am) Just a note: if you reset the ECU, I find the first tank or two gives very poor gas mileage as the computer re-learns your driving style.   A battery failed on me just before a long highway trip, resetting the ECU.   Jim
#50 of 98 Re: CA gas... [bkaiser1] by 10years Sep 23, 2007 (8:57 am)
Replying to: bkaiser1 (Aug 14, 2007 12:30 pm) I live in Reno and of course have noticed the same MPG differences of going back an forth "over the hill" with my 03 Forester. I've attributed some of the difference to be the drive from Reno to Sac is mostly downhill. Conversely, Sac to Reno is mostly uphill.   FYI everyone, Reno sits at an altitude of 4,500 feet while Sac is virtually a sea level. In between is Donner Pass that rises to about 7,200 feet. The trip is about 120 miles depending on the exact door to door locations.   Just my 1.5 cents. Replies to this message: xwesx (Sep 24, 2007 9:06 am)
#51 of 98 Re: CA gas... [10years] by xwesx Sep 24, 2007 (9:06 am)
Replying to: 10years (Sep 23, 2007 8:57 am) That is a very likely reason for the difference. I even notice better mileage driving to Anchorage from Fairbanks than the other way around. The difference between the two is a total of about 500 feet elevation with, obviously, some dramatic increases between. We usually see 1 mpg better on the way down.
#52 of 98 08 OB mpg by cptplt Oct 04, 2007 (3:39 am)
first 2 tankfulls of gas on my 08 OB Ltd/PZEV 25mpg calculated and displayed, thats about 2 better than my 98 Legacy Replies to this message: newbaru (Oct 16, 2007 10:26 am) radar1 (Jan 07, 2008 7:12 pm) ateixeira (Jan 08, 2008 9:21 am)
#53 of 98 Re: 08 OB mpg [cptplt] by newbaru Oct 16, 2007 (10:26 am)
Replying to: cptplt (Oct 04, 2007 3:39 am) After 2 tankfulls on my 2008 Legacy the computer shows I am getting 27.1 mpg avg. 2.5 non turbo/automatic trans.
#54 of 98 Re: 08 OB mpg [cptplt] by radar1 Jan 07, 2008 (7:12 pm)
Replying to: cptplt (Oct 04, 2007 3:39 am) I have the 08 basic 2.5 auto, just returned from a 1,000 mile trip and was pleasantly surprised to get 28.2 overall, with most of the driving at about 72 MPH. The tank that had a long stretch of 60 MPH driving saw a 30.5 average. I was expecting worse because my Focus 2.3 ZX5 only got 28 on the same trips, and the label says to only expect 26 on the highway. Replies to this message: ateixeira (Jan 08, 2008 9:21 am)
#55 of 98 Re: 08 OB mpg [radar1] by ateixeira Jan 08, 2008 (9:21 am)
Replying to: radar1 (Jan 07, 2008 7:12 pm) Cool.   In CR this month they test a Legacy 2.5i and an Accord, the 177hp model.   Surprisingly, the Legacy used a little less gas, saving about $20/year in fuel costs.
#56 of 98 2008 OB XT MT5 by stantont Jan 09, 2008 (3:49 pm)
I have an '08 OB XT turbo, MT5. We just did the first really long trip after breakin (approx 2500 miles at start). Austin, TX to Raleigh, NC and back, crossed the Blue Ridge mountains several times. Two aboard plus maybe 200 lbs luggage. 75-80 mph on cruise control, winter time, so no a/c. Southern states; no ethanol AFAIK.    TOTAL: 103.0 gallons for 2839 miles equals 27.56 mpg. Wouldn't be surprised to see it creep to 28+mpg by 20k miles.   City driving, even during breakin, has averaged 22-23 mpg, but my "city" includes a fair bit of freeway at 65-70 mph. YMMV.    The MPG indicator is about 10-15 % low; it read 25.2 mpg for the trip. At first I was pretty disappointed in "mileage" until I realized the trip MPG calculator was off. I assume the computer tries to estimate gallons from injector on time and fuel pressure, etc., so I shouldn't be surprised at 12% error. As always, actual fuel consumed and actual miles driven are the only way to get credible numbers; and trying to estimate mileage from 7 or 8 gallons in 150-200 miles is not very accurate either. If the pump shuts off 1/2 gallon earlier or later, you introduce +/- 1-1.5 mpg error.    It seems the new EPA test protocol (18 city, 24 highway) is pretty hostile to the turbo, as my real-world experience is far better than EPA estimate. I'm quite pleased; our '02 Legacy L wagon with standard engine and MT5 got 28.5 -29 on the same trip two years ago; and our 2000 Honda Accord V6 automatic got about the same (but was boring to drive!). The turbo/stick car gives excellent performance with very little fuel penalty unless you really USE the power.           . Replies to this message: stantont (Jan 09, 2008 4:18 pm) xwesx (Jan 09, 2008 4:19 pm)
#57 of 98 Re: 2008 OB XT MT5 [stantont] by stantont Jan 09, 2008 (4:18 pm)
Replying to: stantont (Jan 09, 2008 3:49 pm) BTW, if it seems we have changed cars a lot, that is correct. I bought the Accord V6 hoping to get a successor to my 1990 Taurus SHO. Nope, the Accord was refined but boring. Then I bought the '02 Legacy L wagon used in '04 because I really needed a wagon to carry kayaks (on top) and bicycles (inside). Nice but a bit spartan, so I sold it to a friend at 103,000 miles and bought the '08 OB XT MT5.   WOW! This is the first car since the SHO that makes me smile every time I get in and turn the key. Quiet, smooth, refined, luxurious, quick. Rides so soft you expect it to wallow on turns, but it really corners pretty flat. Plus it goes like stink when you nudge the gas pedal!   27.5 mpg highway ain't too shabby, either, for a car with that much performance. Well done, Subaru! Replies to this message: xwesx (Jan 09, 2008 4:19 pm)
#58 of 98 Re: 2008 OB XT MT5 [stantont] by xwesx Jan 09, 2008 (4:19 pm)
Replying to: stantont (Jan 09, 2008 4:18 pm) Hah, well, you have done far better than me in the last 12 months...

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