not sure if this will be usefull at all but, i have a client who pre-ordered his and has kept in great shape since then. but about 6 months ago he noticed it was loosing power and was just running like crap, so he went to mazda and they looked at it and told him there was seal or gasket that went bad and could not be fixed, so 2 days later he went there and he got brand new motor. they also told him that people with the same problem are all getting new motors. and he had only about 60k on it and now it almost new again.