the best rule about making Butter or Oil imo, is to make it too strong verses too weak.Since its a lot easier to control portion size, and can thin out if need be.Ive found for me with oil I like about 30-34 grams of quality flowers and some trim to about a cup and a half of oil.For my butter I just made I used 67 grams of flowers and quality trim with two and a half pounds of butter.that will last for quite awhile.but an ounce for every cup to a cup and a half is a good rule for oil.and just break it down as to how your planning on prepping it.Best of luck dude.eatables are awesome!those amounts make for some seriously nice n strong stuff.:Medibles: