Scotty Kilmer, a veteran mechanic with 46 years of experience and cult following on YouTube, explains how to diagnose car smells -- gasoline, coolant, oil and more. /// YourMechanic.com offers mobile car repair in over 700 U.S. cities. Repairs, maintenance, and diagnostics -- our certified mobile mechanics can do it all at your home or office. Get a fast and free quote at http://www.yourmechanic.com/book.