I'll have to do a comparo between the 100 I have been running and 93 with lead. I know that 93 without lead pings like crazy at any temp over 150. I also know that 100+ octane has definitely got a kick. My car will break loose the tires without much effort when I hit third gear with my automatic. I learned a costly lesson about ping. On a nice 428 I had the lands broke out of the pistons with just a little pinging.