If the oil is turning grey, it could be a blown head gasket, or busted water jacket. If it's fuel in the oil, it depends on what kind of fuel system. Fuel injected systems can have leaking manifold gaskets and leaking injectors. Systems with carburetors can have stuck floats causing fuel to mix with oil. Water doesn't hurt as bad as antifreeze, which can damage bearings. Fuel in oil thins the oil lowering its viscosity and causing more wear.
Now you have a problem. Did you check the head for cracks? Is it the same head? Is the block cracked? Do you have any white smoke at the exhaust? Try a pressure check on the cooling system to try and see where the damage is. Did the engine overheat?
It might be a broken gasket.
If you over fill your transmission fluid, you might blow out the transmission seals. It is most likely that some fluid will overflow, but no damage will occur.
Engine seized? No Depending on distance driven - might have done permanent damage to engine
might be your transmission. you mite have low transmission fluid.
Whenever it shows signs of defect, damage, or leakage. It might last for the life of the vehicle, or it might not.
Your transmission fluid might be low.
check the fluid in your engine it might be low.
It can. You should leave the engine running while you add water to the radiator. If you add water with the engine turned off, but while the engine is overheated, you might damage the engine or the radiator.
A tapping noise might come into the engine because of heat damage to the lifters of the motor. You might also hear a tapping sound if the engine has been damaged due to a blown head gasket.
Your water pump might be broken or your thermostat might need to be replaced. You obviously don't have a leak so somehow the fluid isn't moving through the engine. If the thermostat is broken it will not let fluid into the engine and then the engine will overheat and the radiator will release smoke.
Yes , might go in the gear but does not come out unless you turn Engine off