This page discusses how race car drivers legally enhance speed through methods like efficient gasoline combustion. It notes the phase-out of methyl-t-butyl ether (MTBE) due to contamination issues. Et...This page discusses how race car drivers legally enhance speed through methods like efficient gasoline combustion. It notes the phase-out of methyl-t-butyl ether (MTBE) due to contamination issues. Ethers, organic compounds with an oxygen atom between two hydrocarbon groups, are defined by IUPAC rules, are water-soluble, and have lower boiling points than alcohols due to weaker intermolecular forces. Ethers, once used as anesthetics, are now mainly used as solvents for organic compounds.