After reading the comparo between the LT-1 qnd the LT-4 (besides wishing mine were a LT-4) the next item that popped out at me was the gasoline octane requirement - Regular versus Premium. I have ran High test in mine as I think that is what is recommended in the manual. On the other hand I have not systematically lowered the octane to find where it knocks or detonates - which is what octane seems to be all about. Has anyone used regular gas without any detremental results? ............ when building motorcycle engines (both rebuild and racing) I would use the compression ratio as a guide to determine which octane to use and lower or raise the octane systematically from there - as we could use anything from 87 to 105. Am I reading this comparo correct? or is that a typo of sorts? ........ thanks.