Low compression?

Hello...I just bought a 2004 XR-8 with 46000 miles. It is an automatic 4 speed transmission and onw by a lady before...I took it to Mazda for a compression test. They said it was low...6.2 to 6.7.:banghead:..Now, What does that mean?, do I need a new engine?...Is it possible to get these values up with a carbon clean up or by any other method?....

Any help on this subject would be greatly appreciated...



Newbee