LOL LOL LOL you make it too easy.....but to answer your question I worked on none at 12.....I was playing baseball and stuff like that......but now that I'm an adult I have my own business and fix diagnostic issues on cars that others can't and make money hand over fist to the extent that I have 8 Mopar muscle cars, a 69 Mach 1 and 1 parts car and even the parts car is a 68 GTS.....maybe you should have waited until you were older to start changing oil, LOL