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.
Although your sour cream may appear edible after a day of sitting around your home unrefrigerated, don't take the change of eating it; you could get food poisoning. You may also see mold or smell an unpleasant odor, all signs of spoilage. Properly refrigerated sour cream can last up to two weeks past its printed date.