When I had my first 260, I used to drive it to Moorabbin airport, fill it with avgas along with a jerry can, crank up the timing from 10' to 15' and not worry about detonation! The L28 loved it and the smell was like Channel no5! Unless you run a cat converter, I wouldn't hesitate to run it again. Who would'nt like fuel with a 110 RON rating?