The Green Earth Technologies proprietary process produces saturated chains of carbon, mainly in the 16 to 20 carbon lengths that mimic crude oil distillates in structure. Biodegradability is defined by an ASTM specification that puts the material for 28 days in contact with environmentally present bacteria and measures the proportion that is broken down back into elemental form. The conditions of the engine and the environment are vastly different. So, no, it doesn't biodegrade in the engine. We have engine tests now which show that G-Oil® meets and exceeds the performance of ASTM reference oils in these conditions, and we have an ongoing program to continue to obtain additional test data.