What to do with leftover deep fry oil
Okay, we just made french fries last night in my barely broken in cast iron skillet. They were outstanding and I will never bake them in the oven again. My quesstion, what do I do with the oil? Leave it in the skillet? I hate to toss it since I've only used it once. I just hate throwing it away in the garbage and I don't have a can to put it in.
I also strain and re-use a couple of times, although if you are frying fish that one needs to be kept separate otherwise the next time you use it your food will stink of fish.
Once the oil is past it's prime, then I never know what to do with it, the waste disposal does not seem like a good idea, neither does the sink. I usually dig a hole in the garden and bury it!
Locally, we're supposed to put cooking oil in a closed container, and put it out with the "hazardous" waste. I don't think too many people DO that, but I put it in a used margarine tub, peanut butter jar, or some other such item, and toss it that way. I know in some areas, such as colleges, someone converts used cooking oil for fuel in things like lawn mowers...I don't ask how. Maybe you have something in your area that does that, provided you have the room to collect it and save enough to make it worth while for them.
I pour my oil into wine bottles using a funnel. It gets corked and goes out with the glass recycling.
I save sturdy, wide-mouth large plastic containers for this purpose. (Mayonnaise, Vigo bread crumbs, etc.
I recently did a "blind test" with dinner guests with 4 batches of shrimp fried in the same oil in order to detect whether the residual flavor from one batch adds a positive flavor increment to the next, and it certainly does. No contest. How long can I now keep my-field tested "shrimpy" oil, refrigerated, for what may be a superlative batch #5?