it can be capped once its dissolved in the oil. the oil will not dissolve the gelatin cap. any vegetable oil will work. most raws dissolve easily. the only ones i've had any difficulty with is trendione, and dbol. heating the oil at 300 deg. for an hour dissolves all of the powder though, and it doesn't crash afterward, even when refrigerated.
i usually do 1gram of powder per 100ml of veg oil and yields 10mg/ml which is just right for 2 gelatin capsules.
peg is an option but it cant be capped because it will dissolves the capsule quickly, same as ethanol.