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Thread: Pre-mixed!

  1. #1

    Pre-mixed!

    My 93 SL750 is pre-mixed, but how much gas and oil should I mix together? What is the 1:2, if you know what I mean?

    Thanks...


  2. #2
    Moderator beerdart's Avatar
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    40:1

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    ph2ocraft's Avatar
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    40:1 ratio would be 3.2 ounces of oil to 1 gallon of fuel, here's a little formula.
    Gallons times 128 (ounces) divided by ratio equals ounces needed

    So 1x128/40=3.2 ounces...1 gallon of fuel requires 3.2 ounces
    Or 5x128/40=16 ounces...5 gallons of fuel requires 16 ounces
    Last edited by ph2ocraft; 05-14-2008 at 07:14 AM.

  4. #4
    Click avatar for tech links/info, donation request K447's Avatar
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    Quote Originally Posted by ph2ocraft View Post
    40:1 ratio would be 3.2 ounces of oil to 1 gallon of fuel, here's a little formula.
    Gallons times 128 (ounces) divided by ratio equals ounces needed

    So 1x128/40=3.2 ounces...1 gallon of fuel requires 3.2 ounces
    Or 5x128/40=16 ounces...5 gallons of fuel requires 16 ounces
    I have to chuckle a little here. No disrespect intended

    This fellow is in Denmark, where fuel is sold in liters, as would the oil.

    Calculating the 40:1 ratio there would be, well, 40 liters of fuel to one liter of oil.

    The math is similar in Canada.

    While I am bilingual (metric & imperial), among my children's peers many would have trouble with non-metric units of measure;
    Quarts per gallon (US), quarts per gallon (UK & old Canadian measure), ounces per pound, ounces per quart,
    yards per mile, miles per gallon, and so on.

    Vesterbye, your '93 SL750 tank has a total fuel tank capacity of 37 liters (9.8 US gallons), including the 9.5 liter (2.5 US gallon) reserve. Put an entire one liter of oil in the tank if filling from empty, and you will be close enough.

    Edit: Put the oil in first, then add a few liters of fuel, slosh it around a little if you can, then put in the rest of the fuel. You want to ensure that the oil is fully mixed into the fuel.

    Reserve is 26% of the entire fuel tank volume.

    Just for fun...
    Last edited by K447; 05-14-2008 at 05:00 PM.

  5. #5
    ph2ocraft's Avatar
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    It is funny BUT it's an American site, American at the key board, good or bad, American answer is what he's going to get.
    I do have the formula in Litres as well BUT I have no idea where the guys come from when they visit the board and to be quite honest, don't have the time to check. Nope, American measurements is what gets posted.

  6. #6
    Click avatar for tech links/info, donation request K447's Avatar
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    Quote Originally Posted by ph2ocraft View Post
    ...good or bad, American answer is what he's going to get. ...
    I am just fine with that!

    Just made me chuckle, that's all.

  7. #7
    My faul.. I forgot to tell you, that i'm from Denmark Sorry... But thanks for all the answers. I've just got all the parts, so finally my rebuild starts... Yeeeaahaa...!!!!

  8. #8
    Piston? WHAT Piston?!? JGringo's Avatar
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    So is the 780 the same premix too? 40:1?

  9. #9
    ph2ocraft's Avatar
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    Quote Originally Posted by JGringo View Post
    So is the 780 the same premix too? 40:1?
    Yeppers

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