There are many different types of insulating oil. Quite a few are non-flammable.
Some are 2 carbon atoms different to diesel.
methanol and diesel dont mix
It will be a mix of electric cars, and maybe diesel. Diesel is up for discussion because it doesn't pollute the air, but it is claimed to cause lung cancer. (I doubt it does. If it did, we'd all have lung cancer. We use diesel in semi-trucks, and some regular trucks.)
Yes
No way ! Do not mix petrol with diesel it will ruin your diesel engine and be a very costly repair job.
Mix diesel in a gasoline engine and it will stall or run very poorly depending on how much you mixed in. Mix gasoline in a diesel engine and you will have engine damage.
apparently cooking oil with diesel
Yes you can mix oil and diesel for burning brush and stuff just don't put it in any engines!
It does not mix under normal conditions. If this is happening with your diesel engine you may have engine trouble.
Yes you can mix everything but don't put it in your engine because it will destroy it.
You'll ruin the engine.
Yes it will - diesel is a very good solvent for TiCl4
In a gasoline engine, definitely not. There are times when it is not inappropriate to add small amounts of gasoline to diesel for a diesel engine.