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| Fuel mixing confusion (oil ratios) [m... |
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gregoryan
Advanced Member
Username: gregoryan
Post Number: 50
Registered: 09-2004
| | Posted on Wednesday, December 09, 2009 - 07:11 pm: | 
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On a couple of occasions now i have observed people's interpretation of fuel to oil mixing ratios; and some think that;
50:1 [wrongly] means fifty ml per litre.
25:1 [wrongly] means twenty-five ml per litre.
Really they have it backwards. The "1" is always the Oil !
which meant their method has them making an oiler mix at 50:1,,,,,, then a lean mix at 25:1 !!!! Oh-O!
Simply; ................
25:1 means 25 parts Petrol to 1 Part Oil
50:1 means 50 parts Petrol to 1 part Oil
If you were to get it wrong ; then your 50:1 could actually be turning-out as oily 20:1
and your 25:1 could actually be turning-out as 40:1
Luckily - Putt putt 32:1 happens to have a tricky number that almost works with either calculation;
[ 1 litre ] 1000ml petrol, divide by 32 = 31.25 ml oil
So; if you were to just put in 32 ml per litre of petrol, it would happen to be close enough!
So, for metric; calculate your litres of petrol in thousands of millilitres, as your oil too will be measured in millilitres.
Eg; 5 litre of petrol @ 50:1..........=
5000ml divide by 50 = 100ml of Oil to be added |
scott_n
Senior Member
Username: scott_n
Post Number: 124
Registered: 02-2008
| | Posted on Thursday, December 10, 2009 - 04:33 pm: |
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well my palmer takes 1 pint of cylnder oil to 5 gallons of gas I guess it depends were you are |
keith
Senior Member
Username: keith
Post Number: 269
Registered: 02-2002
| | Posted on Friday, December 11, 2009 - 02:15 pm: |
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Which is 40:1 |
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