I'm making it and doing as many "quality" tests on it that I can in my make shift lab at work (I teach chemistry). If you look up and read the reports from U. Missouri, Iowa, Kansas, and Idaho most of the information I can gleen is that the injectors are buliding up double the amount of carbon as normally would occur; hence the suggestion and tests using IDI diesel showed no abnormal problems except for rubber swelling and eventual decomposition.

As for quality I have met (exceeded) viscosity, density, and pH. My concern currently is cetain(sp) content and of course methyl removal. This is best done with triple washes and air drying. This is all expidited when using heat 120F. I have used over 10gallons but not im my 6.0.