What is...

It was that too. I had a high compression engine in a 56 Chevy that I drag raced with. Regular gas didn't work so Ethyl was my best friend. Regular gas was 17 cents a gallon and Ethyl was close to a quarter a gallon but it was worth it.
 
good answers, folks!
 
Anybody else have traumatic childhood memories of castor oil? Paregoric? ;vo
 
OH YUCK!!! I hated paregoric with a pink and purple passion! Even after you had swallowed it your mouth tasted like crap for a long time and nothing would really wash that taste from your mouth.