I run the stroke oil in my 01, and mix it at approximately 100:1, so about a quart per fill. I use the cheap marine 2 stroke oil from Walmart. The marine stuff is to be less smokey (I know, moot point in a diesel), and better for corrosion resistance and be less gummy. Been doing it for 10 years and not had any injector/Vp44 pump problems. The one thing I did find is change in mpg. On the few times I had no 2 stroke oil, I would get up to 1-2 mpg better without the oil. I still would rather pay that price, than having mechanical issues.