Are cars sour?

     I'm sure everyone has heard the term 'lemon' mentioned in reference to a car that doesn't run well. I, too, have used that to describe my first car (a ford escort that overheated every time I drove it). And, once again, those little phrases are one of life's oddities. Why would a car be likened to a fruit?
     Lemons are sour. That is a known fact, but is a car sour? I've never tried licking one, so maybe that's where I'm missing the point. I personally love lemons with a little salt, just thinking about it makes my mouth water. Should I try that with my car? Will a little salt make it run better?
     As I prepare these posts, it really makes me wonder what people were thinking. Honestly, I think they could have come up with a better comparison. When I have to pay my mechanic for each expensive problem with my car, I get a bitter taste in my mouth. So, why not bitter melon? If it's running really well, I could call it a peach because keeping money in my wallet is sweet. A fast car, a blueberry, maybe? Since when you drop one they roll away so fast you can't even find it.
     I wish everyone a happy beginning of summer, and I hope all your cars are peaches during this vacation season.