Cleaning Oil!

Today in class we mixed 250mL of methanol, and 12 grams of sodium hydroxide. We put the methanol in some jar's. After that we mixed the sodium hydroxide with the methanol. We put them both in the jar. Then we closed the jar. Then we had to shake the jam can virgirously until the sodium hydroxide was completly dissloved into the methanol. Then we had to take the jar and put it into our bottle of oil which had 1L used cooking oil in it. After we put it in we had to slowly move the bottle back and forth six time's. After that we had to lay the bottle upside down, and let it sit there for a day.