Question: Since e85 varies from station to station and time of year, what is the impact of this change on a vehicle with high boost and lots of timing? Mine was tuned with an ethanol content of around 79/80% but mostly what I am finding now is much lower than that. Am I risking my motor? What if I buy race e85 that really is 85%? Is that going to run leaner than what my motor was tuned for? Since ethanol is cut with gasoline, will the lower ethanol content/higher gasoline percentage fuels tend to detonate sooner? Thanks for any input.