 We are thrilled w/ the Toyota Camry Hybrid. We consistently get over 37 mpg.  It's quiet and once you get accustomed to what all the dials and buttons do, you just have to love it!  I am very proud of the gas conservation I am able to attain.  So, Thank You Toyota!  I've been a Toyota owner for 30 years & I've always had great performance.   The only problem I have is with the Engine Light.  It keeps coming on and I notice the gas cap loosens up.  I'm vigilant to tighten it when filling up, but it still seems to loosen.  I'm concerned, and I appreciate seeing others are having a similar problem. I'll email my dealer today.  Thanks everyone here for your info. 