There is not a whole lot of difference if you are using the oil in an older diesel engine. The diesel oil of today has special additives to combat the soot buildup in the oil from the EGR. The diesel oil will get dirty a lot sooner on the late model engines. A 15w40 for a gas engine can be used in a diesel.
NO, do not use diesel oil and a gasoline engine.
No, putting gasoline in a diesel will destroy the diesel engine.
Yes, never put oil formulated for a diesel in a gasoline engine.
I am not sure what you are asking but putting oil for diesel engines in a gasoline engine with some oil in it would not be good, or vise versa
More than likely no damage was done. Drain out all the oil and fill it with the correct weight diesel oil.
No. Now in a diesel engine that's different. A diesel engine can be coaxed to run on many diffeent types of oil included the old oil from your takeaway food place.
NO!!! It's not the same kind of engine. A diesel engine has glow plugs, a gasoline engine has spark plugs. A diesel engine ignite the fuel by compression, the gasoline engine ignite it with spark plugs.Some people add a SMALL amount of gasoline to their diesel fuel in the winter when the temperature falls below -20 deg celsius (5 deg below zero F), to prevent the diesel from turning waxy.
the oil
You mean "motor oil for diesel engines," rather than "diesel oil the fuel." And the answer is simple: No. It will not. All the popular and not-so-popular brands of diesel engine oil sold in the US carry two ratings: a "diesel engine rating" and a "gasoline engine rating." They do this because most trucking companies also own some gasoline engine vehicles, like pickup trucks for driving to the truck dealership on parts runs, and an oil rated for both gas and diesel engines allows them to put the same oil in all their vehicles.
The type of oil used for a 1977 VW bus is going to depend on whether this engine takes gasoline or diesel. The gasoline engine can use a 10-30, 10-40, or 5-30 weight oil depending on temperature. The warmer the temperature the higher the weight. The diesel engine has the oil already in the fuel.
No, absolutely not. Diesel engines run at a much higher compression than gasoline engines. A typical gasoline engine has a compression ration of 10:1 while the typical diesel compression ratio is 20:1 or higher. The diesel burns fuel through compression and the gasoline burns by ignition. You must use an oil with an API rating of C (Compression) in a diesel. Gasoline engines use API rating S (Spark). Use exactly the proper weight and API rating as listed in your owner's manual. Use a gasoline motor oil and you will destroy that diesel engine. -IMPROVED - I totally agree with Almostevil. I own a diesel and this is what I use. So, I didn't "improve" his answer but do back it up!
not much. it would change the viscosity of the oil. the diesel oil is much thicker than regular engine oil.