do you mean cooking oil kent? if so just put the buds and oil in a double boiler and simmer for 4-6 hrs being carefull not to let et boil as the thc will evaporate out and also try to leave the cover on the whole time. after its done strain the oil and your all set to start cooking. that's how i do it except instead of oil i use butter and water and when its done i just strain it, let it cool and remove the butter "disc" from the surface of the water.

doco, yes hydrated lime is much stronger than dolimite lime. with the hydrated lime it is very easy to add too much and have a very high ph but my experience with dolimite lime no matter howe much you add the ph never seemns to go over 7, although 1tbsp per gal is plenty to keep your ph in check throughout the grow.