I just had my car serviced today, and my mechanic mentioned that canola oil was invented (or originally used) as a form of motor oil. Is it true that the canola oil we use in the kitchen is the same as an oil that's been marketed as a motor oil?
Canola is variant of rapeseed "genetically modified" (see comments) through artificial selection techniques.
Rapeseed appears to have been used as a motor oil:
Rapeseed oil was produced in the 19th century as a source of a lubricant for steam engines. - Uncited claim in Wikipedia
However, canola was bred in the 1970s by Richard Keith Downey and his team for the nutritional value of its oil (i.e. it was edible, unlike the original rapeseed oil!).