Can diesel oil be used in gas engine?
if you are talking about using diesel fuel in a gas engine, no you cant. but if you are talking about using lubricating oil rated for diesel engines as a lubricating oil in a gas engine, then yes you can, but be aware that some additives used in diesel engines may not be compatible with some of the sensors or the catalytic converter in a gas engine, and can cause problems long term. one of the ways to get an oil with higher amounts of ZDDP so prevent ruining flat tappet cams is to use diesel rated oil.