I use the regular, and my method is to only apply Endurance after the tires have been scrubbed with soap. Then after wiping the tires and wheels as dry as I can, I apply small dabs of product on the tire swipe (dime sized) about 2 or 3 times, depending on what the tire needs. The trick I use though, is to go back and re-swipe the tires after all the tires are finished, as the swipe is now somewhat loaded with product. I let the tires sit undisturbed for at least an hour if I can. I don't buff off, but rarely get any fling-off. Could be that the evaporation of the little bit of moisture on the tire helps "lock" it in. Great matte finish. I only need to do this once every 3 or 4 washes, depending on how often it has been raining (it rains a lot here in Vancouver). This means usually once a week, or once every other week. Doing this, my bottle of Endurance lasts at least a year. I am very happy with the results and the cost per application.:up