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Fuel Economy

Discussion in 'General Truck Info' started by Ichabod, Jun 21, 2007.

  1. Ichabod

    Ichabod Member

    What are the real numbers you guys are getting? Everyone claims to get 40 - 50 mpg ( which is 4.7 - 5.88 l/100 Km). Fuel numbers for highway maybe? My first look only gives me 30 mpg, which was a combo of city and hwy. My truck, Subaru Sambar has 50K on it, does she need a tune up? I know I am still learning the gearbox and feel of her but 30 is far less than 40/50!

    Thanks
    Ichabod
     
  2. Acerguy

    Acerguy Moderator Staff Member

    Plus your gallons are bigger Imperial ones so that is quite a difference.
     
  3. Ichabod

    Ichabod Member

    I used US gallons for my conversions, to keep it in units most users will know!
    Ichabod
     
  4. Colin

    Colin Member

    For what it's worth, my Sambar does 30-35 mpg normally. I live a few miles outside of town, so about half of my traveling is done at 60-70 mph with the engine screaming. :)

    I have no doubt a Sambar could pull 40+ tooling around town.

    Colin
     
  5. Wolfman

    Wolfman Member

    My best tank so far out of my Hijet is 32.7mpg. I'm capping my top speeds to 55 mph.
     
  6. d rock

    d rock Member

    i did a check on My Acty and it came to 42.5mpg (imp) around the city. this current tank isn't as good as there have been a number of very windy days that have really made it work.
     
  7. unclejemima

    unclejemima Member

    Hey D-rock, how many km does that work out to be on a full tank (35L tank, right?)
    -mark
     
  8. d rock

    d rock Member

    haven't let it run down to empty other than when i first got it and it was right on "E" and put in about 33litres. Put in 20 litres at about 330km and was showing about halfway between 1/4 and 1/2 a tank at that point (i guess that would be about a 1/3 :).
     
  9. Colin

    Colin Member

  10. unclejemima

    unclejemima Member

    wow, thats pretty good. I have not run thru a tank yet, but i dont think i'm getting that good.
    Is that mainly city driving?
    I will post when i run thru a tank.
    -mark
     
  11. unclejemima

    unclejemima Member

    Well, i filled up this morning, i get approx 300km on a full tank (35L) whatever that translates into MPG. Not as good as i thought...
    -mark
     
  12. d rock

    d rock Member

    geez- that doesn't sound so good. when i'm at 300km on a tank it show just a hair under half a tank! thats all city driving for me too.
     
  13. Wolfman

    Wolfman Member

    You need to add to the decimal point on your fill. with a small tank, rounding to the nearest even number makes huge differences. My last tank came out to 32.7 mpg. This one is going to be alot worse, since it's the one where I pretty much dumped fuel into the engine, trying to limp home on a dead cylinder.

    D rock, these trucks are meant for city use. It's very conceivable that you'll get better mileage in the city, than on the highway. I'm in 5th gear typically by 35 mph. That's a long stretch to get to 55 mph.
     
  14. d rock

    d rock Member

    when i did the numbers on my first tank (42.5 imp mpg) i made sure to calculate the numbers to the decimal point. your right, rounding things off does make for a different outcome when doing mileage calculations. i also agree that the city mileage should be as good or better than screaming down a highway with these little units. even my Diesel Toyota Hilux surf (4runner) gets nearly as good mileage in town as on the highway.
     
  15. d rock

    d rock Member

    okay- the latest numbers are in: 36.8 IMP miles to the gallon (or 30.6mpg for all you Americans). its down from my last tank but like i said, i had a few days of crazy headwinds so i expected it to be down this tank. the ol Acty really doesn't like to have a stiff 70km headwind blowing at 'er.
     
  16. Colin

    Colin Member

    That 30.6 MPG figure sounds about right.
     
  17. unclejemima

    unclejemima Member

    Could anyone figure out what my gas mileage would translate to at 300km per 30L? I'm not so good with the math stuff!
    -mark
     
    Last edited: Sep 22, 2007
  18. unclejemima

    unclejemima Member

    Your telling me! I wonder what you could do on a full tank? I wonder if i can lean it out, it must be running rich like an SOB. I haven't pulled the plugs yet, but i bet they are BLACK! I know i can smell what seems like a trace of unburnt fuel when i'm at idle. Any advice would be great!
    -mark
     
  19. Wolfman

    Wolfman Member

    300km * .625 = 187.5 mi. 30L divided by 3.79 = 7.9 gallons

    Your numbers come to approximately 23.7mpg (US)

    I made a spreadsheet on my laptop that automatically converts from metric to US measurements, and then figures the fuel economy.

    If this is what you got out of your minitruck, then you need to find out what's up with the truck, or evaluate your driving habits. If nothing else, these should be staying easily north of 30 mpg.
     
  20. unclejemima

    unclejemima Member

    I know this seems terrible! I was on the highway a few times this tank, with a nice head wind. Perhaps this is why my mileage was so bad. I usually don't floor it because it seems to make no real difference in performance, neither do i rev the heck out out of it, i like to keep my rpms low. I'm usually in 5th gear at 50km/h.

    I wish there was some way to lean the mixture, to me, i think it just running very rich. Perhaps the altitude difference between japan, and where i live. I live at approx 2195 ft above sea level. I know altitude can make a big difference in jetting. Can i adjust the jetting on these things?

    Any help would be greatly appreciated!
    -mark
    PS...its a 1991 honda acty.
     

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