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Picture of Make an oil-burning candle
I had extra cooking oil that was used to fry tortillas for enchiladas. I couldn't just let it go to waste, so I made this support for holding a cotton wick.

This can be used to make any oil holder into a nice candle. If you are careful with the oil level, the wick will be consumed very slowly.
 
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Step 1: Assemble Parts

Picture of Assemble Parts
Use an all-cotton string for the candle wick. Synthetic fibers will not burn cleanly. I am using a kitchen string that is used to truss poultry and tie up roasts.

Any kind of wire can be used for the wick support, but I had a spool of copper wire on hand. A large paperclip may also work.

Step 2: Begin winding wire

Picture of Begin winding wire
Loosely wind the wire around the matchstick.

Step 3: Complete the wick holder

Picture of Complete the wick holder
The coil should be made loose enough to slip off the matchstick. I use a fingernail to separate the turns of the wire slightly.

If the wire is packed closely, it will wick enough oil to burn along the entire copper sleeve.

Step 4: This is the finished wick holder

Picture of This is the finished wick holder
Adjust the spiral base to place the coil in the center, slightly suspended.

Step 5: Cut the wick

Picture of Cut the wick
The length is not really important. Just so it is longer than the wire coil.

Step 6: Fill a container with oil

Picture of Fill a container with oil
Adjust the wick so only an eighth of an inch projects past the copper coil.

Step 7: Now use your match

Picture of Now use your match
The oil may be a little difficult to light, compared to a wax candle.

Step 8: Using a candlestick to hold oil

Picture of Using a candlestick to hold oil

Step 9: The wick is not consumed

Picture of The wick is not consumed
Unlike a wax candle, the wick of this oil candle is supplied with fuel as the oil level goes down. The flame remains constant until the last of the oil is burned.