I think it is a 2.5 horsepower engine. There are 4 oil formulas for Kawasaki lawnmower engines. I recommend you use the correct blend as stated in your owner's manual.
50 to 1. Use good Oil
If it is a 2 cycle where you mix the oil with the gasoline then use 2 cycle marine oil. If it is a 4 cycle then use the weight recommended by Evinrude.
i have a 25 hp mariner and i use a 50:1 mixture
No you can not use gas engine oil in diesel engine oil because processing of diesel engine is different from gas engine oil. If you use this then it damage your vehicles.
the engine oil to use is 5-w20
NO, do not use diesel oil and a gasoline engine.
what is a good engine oil to use in my car
You can use any SAE certified engine oil in your Nissan. The engine oil should be a 10W-30 weight engine oil.
The fuel to oil ratio for a 2000 model, 25 hp Mercury outboard, is 50:1. Use one pint of two cycle oil, to six gallons of fuel.
Common sense. Use the incorrect oil and you will damage the engine.
No, you cannot use ordinary car engine oil. Use a JASO MA or MA2 approved oil, or SAE SF or SG graded oil.