I have been switching between 110 race and 100 low lead av gas for a few years, we run 12 to 1 and i cant tell much of a difference between the two, except price and distance to buy the race fuel, I haven't seen any corrosion from the av gas we use a shell product, with the 100LL I make good power with 32* total 34* on 110 with W5 heads and that's about the only change I have found, but I like the smell of 110 better