What's my leather type?
You can tell what type of leather your car has with this easy test; put a small drop of clean water on the surface of the leather seat, let it sit for 30 seconds and then wipe it off. If it gets absorbed into the seat and leaves a mark, it is certainly an uncovered type (don't worry, the drop mark will evaporate and not damage the seat), if water does not penetrate and beads on the surface, and leaves no darker mark, you've got the pigmented PU coated leather or a semi aniline coated leather.
Another test is scratching the leather with your finger nail, if it changes colour to a darker or lighter shade it is not protected and would be an Aniline type. Some super expensive exotics and luxury transports still occasionally use this leather, but due to its hard to care for nature it has been slowly phased out of the cockpit. With nothing on the surface protecting them, the use of special cleansers, protectants, oils, balms and even some waxes can be used to clean and maintain them.
However, for the vast majority of vehicles, in this day and age of better designed leather, this is not the case. Neatsfoot, Lanolin, Mink Oil, Beeswax (or any natural wax), Tea Tree Oil, oil based conditioners, even the falsely named Banana Oil (we always have a laugh at this one, as it is impossible to get any oil from a banana, no matter how hard their marketing departments have their hand working away at it. Its real name is isoamyl acetate - nothing at all that comes from an actual banana, and certainly not a suitable ingredient for leather care). All these traditional ingredients are now damaging to PU coated leather, regardless of what they say on the product label.