I have used PRI-G the 16 oz version for a vehicle I had in storage. The vehicle had winter gas in it. I live in BC Canada so that means the gas or fuel very had unstable components in it; 18 months later when I was ready start the vehicle the gas not degraded and the vehicle worked started with no problem.
Best Answer: >If the ranch has a preservative added, give it a shelf life of about 3 months unrefrigerated. Otherwise, if it has been out for more than 4-5 days, at room temp then toss it. You are right, we are spoiled alright, but we also live longer than a lot of people do in the world due to less food poisoning.
Salad dressing does indeed go bad, though different types of salad dressings have different shelf lives. If unopened, creamy dressings (like Ranch or Thousand Island) are safe to consume for about two months past the printed expiration date. Unopened vinegar and oil dressings, like balsamic vinaigrette, will stay fresh for up to four months past the written expiration date. For the most part, this will give the unopened bottle of dressing a shelf life of one or two years, if kept in a cool dark place, like your pantry or cellar. Once a bottle of salad dressing is opened, the shelf life diminishes rapidly. Creamy dressings can be kept for up to four months in the refrigerator, and oil and vinegar based dressings should be consumed within six months.