What helps clean the engine to keep it running strong?

I have heard of as well as seen these products in places such as Auto Zone that you either add to your fuel or oil. Its supposed to clean the engine from oil deposits and gunking up your engine. I can see that the last owners were not good at keeping up with their oil changes. For example the last oil change before I bought it was after over 13,000 miles and before that one was almost 8,000 miles. I am very meticulous in staying consistant with my car fluids and oil changes. I see a lot of conflicting answers online. Should I consider doing this for my 2020 Nissan Rogue SV AWD vehicle? And if so what is the proper way of doing these things?