About the Golden Spectro, Green. I put 86k on my 85 900 Ninja, and ~105k on my 90 ZX11 using Golden Spectro, and neither of those engines ever had any oil type problems. In fact, I took the oil pan off the 900 before I sold it, and the inside of that engine was clean enough to eat off of, not a speck of anything anywhere. The 12's innards are happily spinning in it right now. Not only does G. S. promote easier, smoother shifting, but if you use it regularly you'll never get sick, you won't get any older, and you'll never die!!