2005 MAZDA MAZDA6 User Comment / Complaint

2005 mazda 6 6 cylinder with 61000 miles , needs new engine. the only sign was a screech noise a few times , took it to an auto shop, where they checked the belts ,and we could not reproduce the sound. started a minor oil leak ,and less than 4 days later engine failure, and the dealer says it needs a new engine. just out of warranty. mazda dealership says the oil looks black and indirectly told me that i probably did not do regular oil services, which is untrue . i just did not use the dealership. contact the mazda corporate, and they said they will investigate this problem , but have not received any response. i am totally disappointed in this vehicle, who i nursed and mostly did longer distance driving. the dealership repeatedly said that the car has a lot of miles on the odometer for its two years old. never had any vehicle who disappointed me like this! expensive lesson for me and mazda have not been helpful at all. every communication have been really vague and every person which i talked to made sure that i that i know that the car have not been maintained by the dealership and stressing the fact that the car does not have any warranty. not any real help from the mazda dealership except giving me the expensive quotation for a new engine. did not offer to take up the issue with mazda corporate even though the car is fairly new and well taken care off. the warrant just expired a 1000 miles ago. any one with a similar experience of engine failure in a relatively new car?