Antonyms of adj high-octane

2 senses of high-octane

Sense 1
high-octane -- (used of gasoline; having a high octane number)

INDIRECT (VIA efficient) -> inefficient -- (not producing desired results; wasteful; "an inefficient campaign against drugs"; "outdated and inefficient design and methods")

Sense 2
high-octane, high-powered, high-power, high-voltage, high-energy -- (vigorously energetic or forceful; "a high-octane sales manager"; "a high-octane marketing plan"; "high-powered executives"; "a high-voltage theatrical entrepreneur")

INDIRECT (VIA dynamic) -> undynamic, adynamic -- (characterized by an absence of force or forcefulness)

Similarity of adj high-octane

2 senses of high-octane

Sense 1
high-octane -- (used of gasoline; having a high octane number)
       => efficient (vs. inefficient) -- (being effective without wasting time or effort or expense; "an efficient production manager"; "efficient engines save gas")

Sense 2
high-octane, high-powered, high-power, high-voltage, high-energy -- (vigorously energetic or forceful; "a high-octane sales manager"; "a high-octane marketing plan"; "high-powered executives"; "a high-voltage theatrical entrepreneur")
       => dynamic (vs. undynamic), dynamical -- (characterized by action or forcefulness or force of personality; "a dynamic market"; "a dynamic speaker"; "the dynamic president of the firm")