I believe it is 11% oil content. Even the non modded, non pre-ran .24s are shimmed for 30%? I wasnt aware of this. Whats the fix? I have always heard the higher the nitro content the more you want to lean to the coldest plug you can get away with. It starts up so easily and idles down great. After i get the shimming issue out of the way I will be ordering some hotter plugs. Any recommendations on the LSN to "stiffen" it up a bit?