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Mileage

Discussion in 'Gen 2 Prius Main Forum' started by maggieddd, Jul 24, 2005.

  1. maggieddd

    maggieddd Senior Member

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    OK guys. Here is my situation. I have a 100 mile commute to work round trip. I go to Providence, RI from Boston, MA via I-95S, A/C set to 79 degrees (I don't like it too cold, my small bones would freeze if it was less than that). I am getting about 57.5mpg average on my first tank of gas, that's 538 miles driven. I had 58.2mpg on Friday when I came back from work, but running some short trips in a city yesterday, dropped it to 57.5mpg. I go no faster than 65mph, once in a while I'll get to 70. Most of the time I go about 60mph. I used to go 90mph in my Corolla, and just figured out that it doesn't really make a huge difference, maybe 10min max time difference. I really work hard on driving the car though (makes my time go faster since I am watching the screen constantly). Anyway, I don't seem to be able to beat 58.2mpg. What else can I try? I seem to loose a lot when I get down to like 54mph and try to get back to 65mph. Everyone passes by me and I try to keep up with them and I have a hill ahead and then my mpg drops to almost a single digit. Anything else I can try? I am not complaining about my mileage, just curious if I can do better.

    Thanks,
    Maggie
     
  2. vande23

    vande23 New Member

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    I am guessing that you are exceeding the average for everyone else quite a bit. Not much else to suggest to you other than the average stuff in other posts out there... (air pressure in tires, etc).
     
  3. silentak1

    silentak1 Since 2005

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    58.2mpg is very very good.... I can't seem to beat 49.4mpg here in California.
     
  4. Tideland Prius

    Tideland Prius Moderator of the North
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    I haven't broken 55mpg. I came close at 54.7mpg on my last tank. I guess wait til the break-in period is over and you'll break 60.
     
  5. Godiva

    Godiva AmeriKan Citizen

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    You're doing extremely well considering your car is so new.

    Remember, there is a break in period. Not just for "learning" how to drive the car but also physically for the car. My mileage went up by about 5 mpg around the fourth or fifth tank. I'm hoping it will go up again after my first oil change and again a little after I put 5,000 miles on the car.

    I wouldn't worry. You are doing VERY well. Don't expect to best or even meet the EPA. Very few do.
     
  6. efusco

    efusco Moderator Emeritus
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    Well, I guess it depends upon how badly you want to get it higher. You're doing about as well as can be expected for OEM set-up.

    You didn't mention tire pressure, if not at 42f/40r you could pump them up to that for a slight improvement...watch the pressure closely in any case as they will change with time and temp.

    Maintain "dead-band" acceleration when you're getting back up to speed...that is no arrows to or from the battery.

    Shed any excess weight in the vehicle. Maybe leave the tonteau cover and hidden area cover and cargo mat at home, any other nick nacks that aren't essential too.

    Dropping speed further will help too, of course, but don't become an obstruction.

    You can try drafting if you feel you can do it safely...no closer than 2 seconds behind a big rig will give you a measureable gain.

    If you wanna get really 'sick' about mileage you can remove the side-view mirrors, the antenna, pump up tire pressures in excess of safe levels, add addtional battery capacity, go to 0W20 oil....etc.
     
  7. 9G-man

    9G-man Senior Member

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    If you are REALLY serious you could strip your interior of seats, door panels and carpet, replace the side and rear windows with Plexiglass and buy The TORNADO (intake air vortex generator). :wink:

    Seriously, sounds like you are already averaging better MPG than many.
    Outstanding!
     
  8. maggieddd

    maggieddd Senior Member

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    thanks a lot, I guess I am not going to go too crazy. I'll leave my antenna and side view mirrors. My tire pressure is 33 front 35 rear. I guess I could add more to the tires. Is "dead-band" when you have no arrows at all?
    Also, it just told me to add fuel, I've got 560 miles on this tank. I got a 50 mile commute tomorrow, should I try to see if I can make it on this tank or should I not?
     
  9. efusco

    efusco Moderator Emeritus
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    Tire pressures should be 35 front, 33 rear. It's obviously up to you, but I strongly encourage you to try out at least 40f/38r if not up to 44f/42r.

    I guess if you've got lots of close together gas stations you could try for the 50 miles...or if you can carry some gas with you. But if you're going to be in the middle-of-no where I'd tank up today.
     
  10. maggieddd

    maggieddd Senior Member

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    sorry, I meant 35f/33r. I do have some gas stations on my way tomorrow, maybe I should push it for another 25 miles at least. Did anyone try how much you can do approx. from the moment it starts blinking?

    Also, what's that "dead band"? Is it when you have no arrows at all?
     
  11. kirbinster

    kirbinster Member

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    Dead band is no arrows as you suggest.

    Is it really worth the risk of running out of gas to say you went "X" without filling up? Get some gas today or carry a full gas can with you - not the safest thing to do though. You really don't know how full the tank was when it said full. You might have 100 miles left, or you might have 2. Do you feel lucky today?
     
  12. Mystery Squid

    Mystery Squid Junior Member

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    NO hard acceleration.

    Make the most of topography. You need less accleration to get over a hill than you think. As you BEGIN to crest a hill, let off the gas pedal, and try to engage the EE.

    Maintain your momentum by trying to keep the electric engine on as long as possible while holding a relatively constant speed. This is particularly fun on back roads with little traffic with gentle hills and valleys.

    Whenever the ICE kicks in (depending upon the topography) let off the pedal and try to keep the electric motor going as much as possible.

    Like yourself, I almost always average 58.X per tank without trying to hard, if I'm diligent and do what I wrote, I can keep my average just over 60...
     
  13. kirbinster

    kirbinster Member

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    <div class='quotetop'>QUOTE(Mystery Squid\";p=\"109864)</div>
    I generally make good use of electric power on my way home as I have about a mile or so that is fairly flat in my development and know that the engine will have to run to charge the battery first thing when cold in the morning. I also use it a fair amount locally as we have many hills to go down to get "free" electricity from. That not withstanding, I have read a very interested post somewhere that says the best way to get good mileage (excluding stop start city driving) is to try to never use the electric power by itself. The theory is that all the electricity comes from gasoline and there is conversion losses going from gas to electric and then back to motion. It makes sense.

    I have not tried that approach so I cannot claim it is correct, but it makes good sense. In my terrain I think it makes sense to use the electric, but in flat areas I think that observation may be a better approach. I have been happy getting 50+ mpg in my '02.
     
  14. Tideland Prius

    Tideland Prius Moderator of the North
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    Speaking of shedding weight, as anyone left their compact spare tyre on steel wheels at home? Is it better to carry a can of sealant?
     
  15. silentak1

    silentak1 Since 2005

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    <div class='quotetop'>QUOTE(Tideland Prius\";p=\"109876)</div>
    Sealant cans are NOT recommended by tire shops. Why? Most eat the interior of your tire and the sealant is VERY difficult to remove from the wall.

    Carry your spare tire. Do not use tire sealers.
     
  16. maggieddd

    maggieddd Senior Member

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    thanks, I will try recommended tips tomorrow.
     
  17. jfschultz

    jfschultz Active Member

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    <div class='quotetop'>QUOTE(Godiva\";p=\"109812)</div>
    Actually Maggie has beat EPA by a big margin. This is highway driving! Remember that the EPA highway mileage for the Prius is 51 MPG and she is in the upper 50's!
     
  18. mapsmith

    mapsmith New Member

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    Something to try that has not been mentioned that I have found helps me on the Freeways. Set the Cruise Control by MPG rather than speed. On a semi-regular trip south from Tucson, it is uphill (slightly). Even though the speedlimit is 75mph, I set the cruise at 50+mpg. Usually gives me an average speed about 69 to 71 mph. On the way home (downhill) I set for about 74mpg and usually get 74-78 mph. Not bad for Freeway driving.

    Don't worry about being perceived as a slowpoke. there will be others driving as slowly as you. Besides you will pass them when they are at the Gas Pumps!!!!!

    :lol:
     
  19. ReneGS

    ReneGS New Member

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    <div class='quotetop'>QUOTE(maggieddd\";p=\"109753)</div>
    You're doing a lot better than me. Not only is your commute shorter but you are getting 15MPGs more than me. I do have a long hill I have to climb but I'd love to get highs 40s or low 50s.

    I'm not about to drive unresonably slow so I guess I'll have to settle with low 40s.
     
  20. IALTMANN

    IALTMANN New Member

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    Environment / hills / heat etc..mostly all the good mileages come from northern states (all the way accross the US..not northeast exclusively. Mapsmith you're doing great, my very best tank so far has only been 49.5 - 50 mpg..don't run out of gas!! Hi Renegs..you and me are about at the same MPG point.. Got good tips from Galaxee., she suggested AC off early AM and evenings and nites if possible + firm accelerating, then to coast or maintain speed with electrics or glide ( no arrows ) in town., close windows and use AC with setting temp for 77-78 on the highway. Anticipate all stops and try to coast and regenerate when slowing down always. Exit off freeways, gradually and let off gas and charge up as much as possible. After a while learning to do these tricks improved my mileage 3-6 MPG., from low 40's to mid 40's..still waiting for the 50+ MPG. Most also seem to say switching to synthetic oil at 10,000 miles is a good move, plus the tire pressures raised up from the recommended pressures. Also make sure the dealers don't put too much oil in the car when changing oil. A few also said that CHEVRON or SHELL gas seems to provide better performance. I plan to try that sometime to see.