Filled up with this in Pakenham, not intentionally, just didn't realise they had changed the pumps over. Anyway I still had about a quarter of a tank of regular diesel left when I filled up so not a full tank of Ultimate. It took a couple of days but the difference is definitely noticeable. Quieter, more responsive off the line and also when you plant the foot while moving, cruises at 80 kph in 5th gear at approx 1600 rpm where before was closer to 2000 rpm, and looks like I'll get about an extra 50ks from the tank, on board computer says mileage has dropped from an average 9.6l per 100k before to 9.1 now. Will fill up with it again tomorrow to see if this improves anymore as, like I said this was a mixed batch. Car is 2012 Colorado with 29,000 is on clock.