Potential answers for "Alternative to high-octane"

⭐⭐⭐⭐ REGULAR
⭐⭐ STP
⭐⭐ FLATS
⭐⭐ ANKLET
⭐⭐ ENGINEKNOCK
⭐⭐ HELL
⭐⭐ GASPUMPS
⭐⭐ REGULARGAS
⭐⭐ ENRICHES

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