Have made blue cheese dressing that is good, better than commercial I can buy for sure. Basically, other than a few spices, what-not, it's mayo, sour cream, and crumbled blue cheese. Does anyone have a suggestion on what I can use to thin it out that won't significantly alter its taste and have a long shelf life. I'm dubious about buttermilk or yogurt because of both counts. Thinking about just plain oil. Any suggestions are welcome.