The book on my '08 1800 says E10 is good, and it follows a 5% increase would still be good. As far as punch, or power, there is no difference. My E85 pickup has has much or more power with E85 as it does on E10--there is however that definate lack of milage, which seems to be in the neighborhood of 10%. It is shown that higher concentrations of ethanol will clean an engine, as it is a powerful solvent, and I have seen no data showing damage to injectors, on the contrary it should clean those components. The huge loss of wealth we see each year to people who hate us and our way of life dictates that we turn the tide, even with baby steps at first. Renewable homegrown energy has got to have a place at the table, as does increased domestic oil exploration and drilling, and now we have an administration that has stopped off shore drilling, and refused to go into known areas of domestic oil. Just one guy's thoughts.