I'm never going to "race" the bike, so that is not an issue for me. The issue is finding unleaded fuel that doesn't have 10-20% of ethanol in it. We must get the worst gas here in California. There is a mandate that all unleaded pump fuel must have a minimum of 10% ethanol in them. My real question is what disadvantage as a road bike will I have by using leaded vs unleaded fuels either with or without the HRC030 card?