Frying oil can be reused, so as long as it cleaned off impurities first. Luckily, it's an easier process than you might think ...

Ever wondered whether cooking oil ... Color and Flavor: White in color with a strong taste and aroma. Uses: Ideal for long ...

and has certainly gone bad by 18 months. (Expiration dates can actually be misleading; they’re measured from bottling, which means it’s possible the oil sat around for a long time before then ...