You are ALL right. I did they change in the middle of a 1900 km trip. The most impressive thing it's not the OD readings about gas mileage (which I can confirm because it 's a trip I did whith many different cars). The most impresive thing to mention is the responsiveness of the car, shifts better, accelerates better. It did said in the past error codes may one of them were about the battery but I linked with something else.