Indy 500 advertiser

• Automotive additive brand
• Brand known as "the racer's edge"
• Brand advertised on many Nascar autos
• Oil additive brand
• Richard Petty sponsor
• Indy 500 letters
• Octane Booster maker
• Popular oil additive
• Logo seen on race cars

Douglas Harper's Etymology Dictionary Word definitions in Douglas Harper's Etymology Dictionary
commercial motor oil additive, probably an initialism (acronym) of scientifically treated petroleum . As the street name of a type of psychedelic drug, attested from 1967.