I run C/L on T34, siemens 55's and Wasted Spark and so on, and I run 10.7 to 11,6 km/l doing all type's of driving from cue's, around town to doing 150 km/t .. and I'm quite happy with that...before I did around 9,2 to 9,8 km/l under same conditions ..... and no misfires