In the sixties we used to go to Middletown NY to watch the 1/2 mile dirt track races. There was always a smell in the air after the races began kind of a nice smell. Found out from one of the racers that it was Castor oil the kind they used to give to kids when they were sick, bought at the drug store. It was used to lube the top end in the same way as Fishercat's "Marvel Mystery Oil" I still use it once in a while just for the smell it brings back fond memories.
