yes
An oil furnace has a step up transformer to generate a spark to ignite the oil spray at the tip of the nozzle.
It's to avoid the possibility of static electricity build-up. If static reaches a point where it can create a spark - it could ignite the stored oil - causing a fire.
Yes, machine oil is flammable. It can ignite and burn if exposed to a flame or spark. It is important to handle and store machine oil carefully to prevent fire hazards.
Yes, crude oil can ignite and burn if exposed to a sufficient heat source, such as a flame or spark. The ignition temperature of crude oil varies depending on its composition, but typically ranges from around 400 to 600 degrees Fahrenheit. Once ignited, crude oil can burn vigorously and release heat and smoke.
Most likely, the spark plug will get fouled with oil and will not ignite the fuel. If there is too much oil mixed with the fuel, the fuel will not ignite. If the engine does start, it will emit a bluish smoke until all the oil is burnt. I don't think the engine will suffer any internal damage, but it would be wise to empty the contaminated fuel and replace with fresh so the engine will run more efficiently.
it could be coming from a valve cover gasket that is leaking
There is more fuel going through the combustion chamber than the spark plug can ignite. The excess fuel seeps through the cylinder wall and into the oil sump. You might check the condition of the spark plug, the carburetor setting, the operation of the choke, or even the condition of the air filter.
The pig is dropped into the piping to clean any residue inside the pipeline. It can be very dangerous as it is carried by the flow of the oil. If a spark happens, it can ignite the gas causing an explosion.
diesel engines do not use spark plugs because diesel has more oil, burns slower, and is more difficult to ignite. Therefor spark plugs are insufficient with just spark so instead they use glow plugs witch provides a high amount of heat to the fuel and ignites more quickly and reliably.The amount of compression pressure in a diesel engine is sufficient to produce enough heat to ignite the fuel. The glow plugs are only used on a cold start.
it could be coming from a valve cover gasket that is leaking
There may be more fuel going through the combustion chamber than the spark plug can ignite. The excess fuel seeps through the (main or head) gasket and into the oil sump. You should check the compression with a compression checker in line with the spark plug and the condition of the spark plug, the carburetor setting, the operation of the choke, or even the condition of the air filter.
This could be the residual effect of a flooded engine. when to much fuel gets injected into the engines cylinders the fuel does not atomize properly and causes the spark plugs to short to ground or not ignite the air fuel mix because there is to much fuel and not enough air. Afterwards the fuel leaks past the piston rings and into the oil causing the fuel to become thin and runny. This could cause engine failure. Changing the oil is recommended