Change it on a regular basis.
Baby oil is not an oil that can be used to whiten black underarms. There are oils you can use in a mixture, such as, olive oil, vitamin E oil, and coconut oil.
Oil is often referred to as "black gold" due to its economic value and significance as a valuable natural resource that is essential for powering modern industries, transportation, and other sectors of the global economy.
bad rings or really bad valve seals.
If it smells like sulphur (rotten eggs) catalytic convertor.
black
Not really. Petroleum can be a lot of stuff that comes from black oil pumped out of the ground, while petrol is only the part(made from oil) that can be used to run cars and similar engines.
Oil turns black due to carbonation and absorption of dirt. It has to be changed. If the question refers to automatic transmission oil, then carbonation, dirt and worn out clutch plate particles turns oil in to black.
yes Not really. Gold is a metal and oil is a liquid. Someone can drop pieces of gold into oil but you could easily pick it out. Some have called oil black gold ,but that is only a metaphor. Oil is only "gold" because it made people rich, no other reason
oil!
Black
It is probably due for an oil change.
what should i do if my engine oil go,s black in my bmw 520d