Assertion: fuel's octane rating | /r/HasProperty | beneficial
Facets:
value: to high compression ratio engines
type: CAUSE
Source sentences:
text: Ethanol has close to 34% less energy per volume than gasoline, consequently fuel economy ratings with ethanol blends are significantly lower than with pure gasoline, but this lower energy content does not translate directly into a 34% reduction in mileage, because there are many other variables that affect the performance of a particular fuel in a particular engine, and also because ethanol has a higher octane rating which is beneficial to high compression ratio engines.