Great product. Nowadays it is very difficult to find purely synthetic GL-4 based on ester. None of my local auto parts stores have even a fluid with that spec. This product is exactly as specified on my Nissan. Gone is the jagged shifting, gone is the noise of victory in the cold. This liquid did exactly what I hoped it would. However, I don't want to give five stars for one main reason. Irregular bottle. Since the filler plug on my transmission is difficult to reach, I had to buy a transferβ¦