Just FYI, I did a drain and fill back to back with this fluid from Amazon. It is a FULL synthetic, it is NOT a blend. It worked well, I did back to back drain and fills at 50,000 miles and I noticed my transmission shifted a little smoother. I plan on doing one drain and fill every 25,000 miles as long as I own the car. Mine is a 2015 LS.ACDelco Dex VI gallon on sale for 23.52 on amazon right now!