cking, many of those chemicals and emulsifiers and binders, so the creamy dressings are less likely to separate.
Renee products are great but I find that they are prone to spoilage much faster than a Kraft-type dressing - a side effect of using more natural ingredients. Chemicals extend shelf-life
As far as oils are concerned - calorie-wise, there is no such thing as a light oil >> they all are about 100 cal/tbsp. Where they do differ nutritionally is the ratio of saturated:monounsaturated:polyunsaturated fats. Saturated fats are where the (evil) transfats are. There is also a difference in "smoke point", the temperature where the oil starts to "burn" or smoke. Higher smoke points can be found in peanut, corn, canola and soybean oils - lower smoke points are found in extra virgin olive oil and butter >> that is why food processors and fast food restaurants use the soy and canola oils, with price being the decider.
I like to make most of my own salad dressings - 2 pt oil (extra virgin olive, or for a more "Asian" flavour, use sesame oil), one part vinegar and/or lemon juice. Spice it up with whatever strikes you - any fresh or dried herbs, a dash of tabasco, balsamic vinegar, etc. I have also made my own mayo's >> messy and time-intensive, but O SO Delicious!! Otherwise, I like Newman's Own dressings.