I just got my CB 350 up and running about a month ago. When I was putting it back together I drained all of the old oil and replaced it with fresh oil. Prior to me getting it running, it had about sat with no more than 200 miles put on it for the last fifteen years. I'm going to change the oil here soon and clean the filter/screen, whatever as soon as I read up on how. My question is types of oils. I believe my dipstick says 10w-30 or 10w-40. But my understanding is that the clutch runs through/in/saturated with the engine oil. Are there certain kinds that you can, can't, or shouldn't use. What about additives? I usually put a quart of lucas oil stabilizer in my cars with each oil change in place of 1 quart of oil. Any opinions. It's a 72 CB350 with 7,xxx original miles on it.