I replaced the engine oil with mobil 1 20-50, put the new spectro 6speed oil in the tranny, and spectro heavy duty primmary in the primary. I have noticed the motor seems to like the oil, runs cooler, and alittle smoother. But I just noticed the chains making noise, checked them and they seem ok. The spectro 6 speed tranny fluid guy said it would stop the clunking when I go into gear and when I shift gears. I have put a 150 miles on the new oils and it still clunks into gear while shifting. I cant tell that there is any change yet. But I guess the big test will be when I change it agin and see whats on the plug/magnets. Only time will tell I guess.