Engine oils
You probably have the answer by now? So will be redundent answer probably??? This should have been answered by now. Yes you can use diesel engine oil in a spark ignition engine. Diesel is a ( C) abreavition Gas is ( S) The next thing is , is it turbo rated? Oil companies market oil so that owners can use diesel engine oils in there gas fleet to reduce the costs of multi storaged and the possability of using the incorrect oil in the diesel engines .Where every you have a bulk plant office near by see if they will give you a current or out dated booklet on oil products They will tell you most of what you need to learn on oils.Or collect several? I am needing to find out on Mobil hydrolic oils for work. It should be on the net as well.
If you engine is broken in read up on synthetic oils you will probably switch them? I have been using them since 1986. Good luck in your quest for knowledge, knowledge is power.