Hi Charlie,
It makes sense that this would be the
case. Assuming they are using non-syntechic 2 cycle oil the oil carries
more BTU than the highly refined gasoline. As you know higher Octane
gasoline does not produce more power - it’s the fact that higher octane delays
the onset of detonation which permits higher compression which results in more
power. Higher octane gasoline has fewer BTU than lower octane - all else
being the same.
A high octane fuel, such as
liquefied petroleum
gas (LPG), has a
lower energy content than lower
octane gasoline, resulting in an overall lower power output at
the regular compression ratio of an engine run at on gasoline. However, with an
engine
tuned to the
use of LPG (i.e. via higher
compression ratios, such as 12:1 instead of 8:1), this lower power output can be
overcome. This is because higher-octane fuels allow for a higher
compression
ratio
Ed