Thanks to all who have finally decided that calling our tech line to get proof of my claims, rather than bash them without merit. Anyway, as response to a previus post that stated that he was told that Drive Clean does not contain any Grp I, I can assure you that it does. When we purchase our additive pack from our suppliers, it comes pre-diluted in a Grp I base. So it is true the we only supply the Grp III base, but there is a small Grp I component to carry the additive pack. Grp I is almost always used by additive suppliers because of its solvency and dispersancy characteristics.