Q&A for How to Dispose of Cooking Oil

A good spot would be under the kitchen sink where it won't get used accidentally and its greasiness won't be a problem for food packaging nearby.

Because over time, oil poured into a sink can create a clog, especially when it is done repeatedly over time. It could also damage your soil and plants.

It can be as long as 3-4 years for an early harvest, high-polyphenol olive variety that has been filtered and packaged in a well-sealed tin or dark bottle, but that's not always the quality of olive oil you'll be using, so it's best to buy your olive oil in small quantities and use it within 6 months.

No, it will kill your plants & draw rats. Put it in a jar or other container for recycling.

Diluted or not, oil will clog your drain. Use a large, empty tomato can or similar to collect the oil, freeze it, then toss it or reuse it.

You can put it in a jar/bottle and toss that in the garbage once it has cooled off.

Do not pour it down the drain. Either pour it back into the bottle (oil can be reused), or pour it in a trash bag.

The answer to this question relies on several facts about the storage of/state the oil is in. For example, if the oil was stored in a cool, dry place in an unopened container, it may be okay for consumption. However, if bacteria has entered the container then the consequences could be disastrous. Since common cooking oils (like canola oil) are relatively cheap, it is always a better idea to start with fresh/newer oil than to try to reuse questionable oil.

No, it will negatively affect the taste of the vegetables. Also, it is not healthy. It is best to steam vegetables.

Let it cool down, follow steps 1 and 2 above, then take it home with you and place it in your home refuse bin.

Just collecting it in a container over time would probably be your best solution. It's not appropriate to tip it down the drain.

Follow the instructions of disposal services in your location. That is how it is supposed to be done in some places, but your locality may have different rules.