yes it does from the black residue
Yes, sunlight can pass through oil to some extent, but the oil will absorb and scatter some of the light. Thicker oils will block more sunlight compared to lighter oils.
The metal block will heat faster in oil because oil has a lower specific heat capacity than water. This means it requires less energy to raise the temperature of the oil compared to water.
The plants die usually from lack of sunlight because the oil spreads on the surface creating a block between sunlight and the underwater plants. This lack of sunlight prevents the process of photosynthesis and therefore the plants die from no energy provided.
Yes, sunlight can still pass through oil-covered water to some extent. However, the oil on the water's surface can reduce the amount of light that penetrates below the surface, impacting aquatic life and ecosystems.
A good clue would be water in the oil. That said, just because you do not have water in the oil, doesn't mean the block is not cracked. Have a good mechanic check the car.
There will be oil in the water on a 1997 RM125 if the head gasket is leaking. It allows oil and water to freely mix across the cylinder head and engine block.
You probably have a cracked head gasket, and the oil mixed with the water that circulates through the block and got into your radiator.Or if the car ran hot and you have aluminun heads, you could have warped the head causing the water and oil to mix. Or your block could be cracked.
You have a blown headgasket or cracked cylinder head/engine block. It can also be a leak at the oil cooler. Its at the oil filter mounting, check that 1st.
Lack of water in you engine block. Lack of oil in your engine block. Can cause piston siege.
Bad Head Gasket or Cracked Block (rare)
There is a water leak somewhere in the block.
Water in oil is usually caused by a leaking headgasket. This is the gasket between the engine block and the head. It is an expensive repair.