Hi guys, Just thought I would make a post to help out any new people/or people in general that just are not 100% sure on what the fuel/oil mixing ratios are about IE: 50.1 .... 40.1 etc. Now this will be a bit long, so those that know this can only blame themselves if they read and get bored LOL. Who this is really directed to is people that don't fully understand, or have no understanding, of this topic. Always remember that what you think is common knowledge to you isn't actually something someone else knows.
In this post I will explain (I hope) the following
1. The Meaning of the terms (ratios) 50.1, 40.1, 25.1 etc.
2.A quick easy Formula to calculate the amount of oil to add to the fuel.
3.An understanding of the formular..(why it is used)
4.Quick easy ways to mix your fuel.
1. The Meaning of the terms (ratios) 50.1, 40.1, 25.1 etc.
When you are told that you have to run you minimoto, lawn mower etc on 50.1...40.1...25.1 etc it doesn't mean you add 50mil or 40mil or 25mil of oil to a liter (mil = milliliter). The numbers are called a ratio,the bigger number is always the fuel/petrol and the smaller number represents the oil. So what this means is that you have to picture each number representing a quantity of the fuel then oil to be mixed. So to make this a bit clearer to understand, lets pick the ratio of
50.1
What this means is you need 50 equal parts of fuel to one equal part of oil. So for an understandable example, lets say you have
50 liters of fuel (that is 50 equal parts of 1 liter) looking at the ratio that means that with 50 liters of fuel you have to add the
1 liter of oil that is the 50.1 or 50 parts fuel to 1 part oil.
Now I talked in liters so it could be easily pictured, but for the purposes of your minimoto bike, we will be breaking down 1 liter to Milli liters as the fuel quantity is smaller. We will leave it here though and move on to the formula.
2.A quick easy Formula to calculate the amount of oil to ad to the fuel.
As stated above the fuel quantity is obviously smaller than 50 liters of fuel, what we will be looking at now is mixing 1 liter of fuel and the formula to know how much oil to add.
First let me state that the are fuel/oil mixing calculators on the net, but I think it wise for you to know the quick and easy formula so if you forget how much oil you need to mix with the liter at the track, you can quickly calculate it. (most mobile phones have a calculator on them if you are not good at maths and are stuck at the track)
Remember now that
1 liter of fuel is equal to1000mil of fuel.....1 liter = 1000 mil
For the ease of this explanation we will use the ratio of 50.1 (but this works for any ratio, give it a try)
OK heres the formula to use
1000 divided by 50 = 20 that gives the ratio of 50.1
So we can see that 1000 mil of fuel (1 liter) needs 20 mil of oil for the ratio of 50.1
3.An understanding of the formular..(why it is used)
OK we will stick with the ratio of 50.1 as used above to understand what the formula just did for us.
First we know we want to mix a liter of fuel. A liter of fuel as we now know equals 1000 mil.
So the first number
1000 represents your 1 liter but is converted to mil or milliliters.
The ratio of 50.1 is saying that for every 50 parts of fuel (and we are using milliliters so as to be able to measure the small amount of oil accurately) we need 1 part oil. So in other words for every 50 mil of fuel, we need 1 mil of oil. So we need to find out how many lots of 50 mil of fuel the are in 1000mil (or 1 liter) So to find this out we divided the 1000 mil by 50.
1000 divided by 50
Still with me, if not re read above till you are following.
So now that we have divided our 1000 mil by 50 we come up with the number 20. This means the are 20 lots of 50 mil in 1 liter. We also know that the ratio stated 50.1 or 50 parts fuel to 1 part oil. So for every 50 mil of fuel we have to add 1 mil of oil, we have just quickly worked out that the are 20 lots of 50 mil in a liter so we now have to put 20 lots of 1 mil or 20 mil of oil in to mix correctly.
So once again
1000 divided by 50 = 20
This will work on any ratio... 40.1....1000 divided by 40 = 25...meening add 25 mil of oil to a liter.
So we now know how to work out how much oil 1 liter of fuel needs for a given ratio. If you now want to work out how much oil you need for more than 1 liter, just times your 1 liter figure by the amount of liters you have.
4.Quick easy ways to mix your fuel.
Ive tried a couple of ways, the first way was I bought a large syringe from the chemist (please note dress nice when asking for a syringe, the looks you get other wise are very embarrassing LOL ) The trouble I found with using the syringe was that although it at first measured accurately, it started to lose the measuring numbers on the outside after contact with oil. Although you could scratch a line in the syringe if needed, but if you ever needed a different quantity of oil than what you have marked you have nothing to go by.
The best measuring device I have found and use is a little measuring cup, you can get them from the chemist. the type of cup that you would use to administer medicine, it has measured graduations on the side in milliliters, which is just what you need.
Also it is a good idea to carry a little book in your tool box with notes on settings etc, and you could write the oil quantities for a given ratio in the book as well. Although you may do this the information above is for those that want to know how the quantities are derived.
Anyway I hope this has helped newcomers or those that didn't really understand what the ratios were, and how to work them out. For all those that new this already,and have read this far, well I warned you (thats 10 Min's you will never get back LOL) it was long and detailed, for those that didn't know. I think we all have seen people that don't mix correctly or been asked how to mix fuel so I hope this mite help if people use the search function on the forum.
Just a quick funny story for the experienced that will appreciate it, I was at the track a while back and saw a guy pouring the oil straight from the bottle into the fuel can. When I asked why he was doing it he said he didn't understand the ratios so poured the oil in till he thought it would be enough.
And this was in a worked blata W/C replica
Anyone want to add to this I welcome it and encourage it. Please just remember your audience, the people most likely to read this information are new. So please make your post as detailed as possible. As I said above what we think is common knowledge, isn't necessarily common knowledge to a new comer.
definitely getting one of these shortly. saves having to carry around so many little bits and bobs to mix fuel.
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