|Fuel mixing confusion (oil ratios) [m...
Post Number: 50
|Posted on Wednesday, December 09, 2009 - 07:11 pm: ||
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!
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
Post Number: 124
|Posted on Thursday, December 10, 2009 - 04:33 pm: ||
well my palmer takes 1 pint of cylnder oil to 5 gallons of gas I guess it depends were you are
Post Number: 269
|Posted on Friday, December 11, 2009 - 02:15 pm: ||
Which is 40:1