I'm hoping to start fine tuning the car today and have a fuel question. My original plan was to use regular Shell or BP 93 to tune the car and when I plan on spraying to run non ethanol gas to help keep things a little safer. My question is would it be more beneficial for me to actually tune the car on the non e/ gas for N/A-NOS and just not worry about the times I'm running the normal E10? Or would this cause a problem if I'm running the car hard on the E10?