Guys,
I have a few gallons of fuel that was made last year and though stored properly has no indication on how much lubricant it contains.
Is there any way to find this out ?
The only idea that comes to mind is to take 10 ml in a  test tube and burn it to see how much oil remains.
I know its dangerous, but is there any other way ?
BTW i know it contains no nitro.

-Gaurav

I guess it can be done by measuring the specific density of the pure methanol vs your mixed fuel. You might need a device to measure the specific density though. A testube might be used for this as well with tolerable inaccuracies.

-Ismail

Just let the methanol evaporate from the test tube ? Burning will burn oil too.

I thought about evaporating. But then i thought it would pull a lot of moisture from the air, plus not all methonol would really evaporate.
I did a little experiment and found it. Did with extreme caution. Do not advise anyone else to repeat this unless they know what they are doing.
I put 100 ml fuel in a Borosil beaker ( of 500 ml capacity ) . Then ignited the solution with a match. The fuel burned for around 30 minutes with a beautiful blue flame. It was not a big fire rather a small flame on the top of the beaker.
Seemed to be a nice cycle, as the methanol evaporated it burnt at the rim of the beaker, which generated heat to evaporate more of methnol.
After the flame burnt out, i measured the oil ( while hot ) , as it was very fluid.
Found out it contained 23% of oil.
It contains a Klotz-200 synth + castor blend. Will now mix enough methnol to bring the % to 18% and then will use in my Saito.

Because Klotz is expensive, i want to salvage this fuel.

With a long neck beaker you would have got a nice RRRR-RR-RR-RR sound with flame on its mouth. Anyway, if anyone is trying this out, I would suggest to have the beaker immersed in a bath of water so that it does not explode when its lighted.

-Ismail

Methanol is soluble in water while castor oil is not.
Must be easy to measure a fixed volume of fuel and the wash is carefully with plenty of water and see how much oil remains.
avijit