low-octane

All vehicles built since 1996 are equipped with OBD2 and most will have knock sensors that will automatically adjust the timing if and when ping is detected, so low-octane fuel can be used in an engine designed for high octane, with some reduction in efficiency and performance.

Just past noon on Mr. Lazio's very first day out, at a small sidewalk rally in Watkins Glen, the candidate's high-minded and deliberately low-octane discussion of education and the economy gave way to a mocking jab at Mrs. Clinton's book "It Takes a Village."