November 5, 200817 yr Just to make it different if your using 50:1 then divide a litre (1000ml) by 50+1 parts ie 51 so the amount of oil is 1/51th of a litre so 1000/51 = 19.6ml of oil. Easy to work out on a non drinking night!!!
November 5, 200817 yr Try This So 62.5ml in a 5 litre can ............ KSV Well done Edited November 5, 200817 yr by GIZZA5
November 5, 200817 yr Well i did do a maths degree, so you would hope I could get this right. Anotherfive's method gives a ratio of 51:1 SDC's method gives 80:1 Sam12's method gives 66.6:1 Its quite simple but a lot of people get this wrong and are therefore putting the wrong amount of oil in their bikes. Just convert how many litres of fuel you have into ml (i.e x1000 for those that don't know) then divide this number by the ratio you want. So for 80:1 in 5 litres, use (5x1000)/80 = 62.5ml Simple
November 5, 200817 yr Might as well jump on the band wagon here and kill some time? Should be at home right now but the glorious fog has dictated that I'll spend another night offshore Anyhooz, to work out ANY ratio (either with a good old fashioned pencil and paper or the calculator function on your mobile phone) try to remember this....... Using 80:1 as an example 100 divided by 80 = 1.25 (this is the percentage often seen on a little sticker near the tank, i.e 2% = 50:1) Using 5 litres as an example (turn litres into millilitres by multiplying by 1000) 5000 multiplied by 1.25% = 62.5 (remember to hit the % key or your answer will be out by 2 decimal places) Hey presto...........add 62.5 ml of oil to 5 litres of petrol and you'll have yourself a lovely 80:1 mix ! and while you're all here, if you haven't already voted, VOTE NOW Have a nice night GJ
November 5, 200817 yr Might as well jump on the band wagon here and kill some time? Should be at home right now but the glorious fog has dictated that I'll spend another night offshore Anyhooz, to work out ANY ratio (either with a good old fashioned pencil and paper or the calculator function on your mobile phone) try to remember this....... Using 80:1 as an example 100 divided by 80 = 1.25 (this is the percentage often seen on a little sticker near the tank, i.e 2% = 50:1) Using 5 litres as an example (turn litres into millilitres by multiplying by 1000) 5000 multiplied by 1.25% = 62.5 (remember to hit the % key or your answer will be out by 2 decimal places) Hey presto...........add 62.5 ml of oil to 5 litres of petrol and you'll have yourself a lovely 80:1 mix ! and while you're all here, if you haven't already voted, VOTE NOW Have a nice night GJ Christ you must be bored Gav.... weather is crap right now onshore and offshore Edited November 5, 200817 yr by Slapshot 3
November 5, 200817 yr Hi all, lots of the oil bottles have the desired measuring system buit in , usually marked with different percentages on the side.. so as correctly stated 2% equals a mix of 50:1..
November 5, 200817 yr I have a wonderful little spreadsheet that give all the mixtures in all common measurements. Unfortunately I too am stuck offshore in the North Sea and dont have access to it. If I remember when I get home I'll post a copy.
November 5, 200817 yr Author who needs a maths teacher when there is you lot out there cheers hopfully i wont seize the bike
November 5, 200817 yr I wrote a daft little program to help with that, you can download it from - http://www.johnholburn.co.uk/2StrokeOilMix.zip Unzip it somewhere and run the setup program, any hassles let me know. Runs in XP, not sure about vista. I can guarantee it has no virus's as I don't know how to write them! Hope thats useful to someone.
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