This conversation has already been had elsewhere - but the compression ratio on the LS3 (V8) needs premium. Same as the LS2 (the '1 could run on crude oil though).
2005 Vauxhall Monaro VXR. Sport pac - Road Response Pac - Ripshifter
2005 Vauxhall Astra 1.6 Sport (ug)
2001 Honda CBR 600 F